Mainboard assembly detection system and mainboard assembly detection method

Abstract

The invention discloses a mainboard assembly detection system and a mainboard assembly detection method, and the system is provided with a switching tube which comprises a first end used for receiving an input voltage, a second end used for providing an output voltage, and a switching state control stage used for controlling the switching tube. The control stage is used for connecting the first ends of all the connecting pieces, and the other ends of the connecting pieces are grounded, so that when each connecting piece is correctly connected to the corresponding through hole of the mainboard, the control stage enables the switch tube to be switched on, and otherwise, the control stage enables the switch tube to be switched off. And finally, whether the mainboard is correctly connected with the connecting piece or not is judged according to the magnitude of the output voltage of the switching tube, so that the technical problem of unqualified products caused by unreasonable assembly is avoided.

Description

Technical Field

[0001] This invention relates to the field of motherboard assembly testing, and specifically to a motherboard assembly testing system and a motherboard assembly testing method. Background Technology

[0002] The motherboard is one of the core components of most electronic devices, such as computers, mobile phones, servers, and various smart terminal devices, and is the foundation for ensuring the normal operation of various functions. A motherboard is typically a rectangular printed circuit board with precision circuitry. Various interfaces, slots, and solder points are pre-drilled on the board for fixing and mounting the device's core electronic components. The various components within the device communicate and transmit signals through the circuitry on the motherboard.

[0003] Complete electronic devices are typically secured with a motherboard and screws. If the motherboard is not properly assembled or is missing screws, it may shift or wobble when it reaches the end user. Since the motherboard is a live component, if the structural frame is too close to the power supply components, there is a risk of short circuits damaging the motherboard and the entire device. Therefore, a securely fixed motherboard is crucial for the safe manufacture and stable operation of electronic equipment. Summary of the Invention

[0004] The main technical problem solved by this invention is to detect whether the motherboard is properly connected to the device, so as to avoid product defects caused by improper assembly.

[0005] According to a first aspect, one embodiment provides a motherboard assembly detection system for determining whether a motherboard is correctly connected to a connector. The motherboard includes at least one through-hole, and each connector is used to connect to one through-hole. When any connector is correctly connected to the corresponding through-hole, the connector is grounded. The motherboard assembly detection system includes:

[0006] A switching transistor, including a first terminal, a second terminal, and a control stage;

[0007] The first terminal is connected to a power source to receive the input voltage;

[0008] The second terminal is used to provide the output voltage, and the magnitude of the output voltage of the switching transistor is used to determine whether the motherboard is correctly connected to the connector;

[0009] The control stage is used to control the switching state of the switching transistor; the control stage is used to connect the first end of all the connectors, and the other end of the connectors is grounded, so that when each connector is correctly connected to the corresponding through hole on the motherboard, the control stage enables the switching transistor to conduct; otherwise, the control stage enables the switching transistor to turn off.

[0010] In a further embodiment of the present invention, the motherboard assembly detection system further includes:

[0011] At least one load resistor, each connector is connected in series with a load resistor and connected to the control stage, and each load resistor is connected in parallel with any other load resistor;

[0012] The control stage is connected to the first terminal via the voltage divider resistor.

[0013] In a further embodiment of the present invention, the switching transistor has a threshold voltage. When the voltage difference between the control stage of the switching transistor and the first terminal is greater than the threshold voltage, the switching transistor is turned on; otherwise, the switching transistor is turned off.

[0014] When each connector is correctly connected to the motherboard and each connector is grounded, the voltage difference between the switching transistor control stage and the first terminal is greater than the threshold voltage, causing the switching transistor to conduct.

[0015] When any connector is not properly connected to the motherboard, the connector is not grounded, and the voltage difference between the switch control stage and the first terminal is less than the threshold voltage, causing the switch to turn off.

[0016] In a further embodiment of the present invention, the motherboard assembly detection system further includes:

[0017] A linear regulator is used to convert an unstable input voltage into a stable output voltage.

[0018] The linear regulator includes an input terminal and an output terminal. The input terminal is connected to a power supply, and the output terminal is connected to the first terminal.

[0019] In a further embodiment of the present invention, the motherboard assembly detection system further includes:

[0020] A current-limiting resistor, one end of which is connected to the output terminal of the linear regulator and the other end of which is connected to the first terminal, is used to limit the magnitude of the current.

[0021] In a further embodiment of the present invention, the motherboard assembly detection system further includes:

[0022] The first filter capacitor has one end connected to the input terminal of the linear regulator and the other end grounded, used to stabilize the voltage.

[0023] The second filter capacitor has one end connected to the output terminal of the linear regulator and the other end grounded, and is used to stabilize the voltage.

[0024] In a further embodiment of the present invention, the motherboard assembly detection system further includes:

[0025] A diode, with one end connected to the control stage and the other end grounded, is used to prevent static electricity.

[0026] According to a second aspect, one embodiment provides a motherboard assembly inspection method, applied to the motherboard assembly inspection system described above, the motherboard assembly inspection method comprising:

[0027] Connect each connector to the motherboard;

[0028] Determine whether the motherboard is correctly connected to the connector;

[0029] The step of determining whether the motherboard is correctly connected to the connector includes:

[0030] Determine whether the output voltage of the switching transistor is greater than a threshold.

[0031] If so, then ensure that each connector is correctly connected to the motherboard;

[0032] If not, then it is determined that at least one connector is not properly connected to the motherboard.

[0033] A further provision of the present invention includes, before connecting each connector to the motherboard:

[0034] The threshold voltage of the switching transistor, the resistance value of the voltage divider resistor, and the resistance value of the load resistor are set such that when each connector is correctly connected to the motherboard, the voltage difference between the switching transistor control stage and the first terminal is greater than the threshold voltage, and the switching transistor is turned on; and when any connector is not correctly connected to the motherboard, the connector is not grounded, the voltage difference between the switching transistor control stage and the first terminal is less than the threshold voltage, and the switching transistor is turned off.

[0035] A further provision of the present invention includes determining whether the motherboard is correctly connected to the connector, comprising:

[0036] The second terminal of the switching transistor is connected to a chip, so that when the switching transistor is turned on, the chip works normally, and when the switching transistor is turned off, the chip cannot work normally.

[0037] Determine whether the chip is functioning properly;

[0038] If so, then ensure that each connector is correctly connected to the motherboard;

[0039] If not, then it is determined that at least one connector is not properly connected to the motherboard.

[0040] This application discloses a motherboard assembly testing system and method. By incorporating a switching transistor, which includes a first terminal for receiving input voltage, a second terminal for providing output voltage, and a control stage for controlling the switching state of the transistor, the control stage connects the first terminal of all connectors. The other terminal of each connector is grounded, ensuring that the control stage turns on the transistor when each connector is correctly connected to its corresponding via on the motherboard; otherwise, it turns it off. Finally, the output voltage of the switching transistor is used to determine whether the motherboard is correctly connected to the connectors, thus preventing product defects caused by improper assembly. Attached Figure Description

[0041] Figure 1 This is a structural block diagram of the motherboard assembly and testing system in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the motherboard assembly and testing system in an embodiment of the present invention;

[0043] Figure 3 This is a flowchart of the motherboard assembly and testing method in an embodiment of the present invention. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0045] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0046] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0047] The motherboard is one of the core components of most electronic devices, such as computers, mobile phones, servers, and various smart terminal devices, and is the foundation for ensuring the normal operation of various functions. A motherboard is typically a rectangular printed circuit board with precision circuitry. Various interfaces, slots, and solder points are pre-drilled on the board for fixing and mounting the device's core electronic components. The various components within the device communicate and transmit signals through the circuitry on the motherboard.

[0048] In practical applications, complete electronic devices are typically secured with a motherboard and screws. If the motherboard is not properly assembled or if screws are missing, it may shift or wobble when it reaches the end user. Since the motherboard is a live component, if the structural frame is too close to the motherboard's power supply components, there is a risk of short circuits damaging the motherboard and the entire device. Therefore, a securely fixed motherboard is a crucial prerequisite for the qualified manufacture and stable operation of electronic equipment.

[0049] Based on this discovery, this invention discloses a motherboard assembly testing system and method. The system incorporates a switching transistor, which includes a first terminal for receiving input voltage, a second terminal for providing output voltage, and a control stage for controlling the switching state of the transistor. The control stage connects to the first terminals of all connectors, with the other terminals grounded. This ensures that the control stage turns on the transistor when each connector is correctly connected to its corresponding via on the motherboard; otherwise, it turns it off. Finally, the output voltage of the switching transistor is used to determine whether the motherboard is correctly connected to the connectors, thus preventing product defects caused by improper assembly.

[0050] The concept of the present invention will be explained in detail below through specific embodiments.

[0051] In some embodiments, please refer to Figure 1 , Figure 1This is a schematic diagram of the motherboard assembly detection system in an embodiment of the present invention. In some embodiments, the motherboard assembly detection system is used to determine whether the motherboard is correctly connected to the connector 300. The motherboard includes at least one through hole, and each connector 300 is used to connect to one through hole. When any connector 300 is correctly connected to the corresponding through hole, the connector 300 is grounded. In some embodiments, the motherboard can be a rectangular printed circuit board with precision circuitry, and the connector 300 can be a screw and a nut. The motherboard is fixed to the device housing via the connector 300. In some embodiments, the through hole appropriately exposes copper in the pressing area of ​​the connector 300. Because the motherboard is covered with insulating solder mask, the exposed copper area refers to the area that is not covered by solder mask and directly exposes the copper of the motherboard, and this exposed copper is grounded. When the motherboard and the nut are pressed together, and the screw is driven into the nut through the through hole of the motherboard, the motherboard and the connector 300 will be in a metallic conductive state, so that when the connector 300 is correctly connected to the corresponding through hole of the motherboard, the connector 300 is grounded.

[0052] In some embodiments, the motherboard assembly detection system includes a switching transistor 100, which includes a first terminal 110, a second terminal 120, and a control stage 130. The first terminal 110 is connected to a power supply to receive an input voltage. The second terminal 120 provides an output voltage. The second terminal 120 of the switching transistor 100 is connected to a chip 900. The magnitude of the output voltage of the switching transistor 100 or whether the chip 900 is functioning properly is used to determine whether the motherboard is correctly connected to the connector 300. The control stage 130 controls the switching state of the switching transistor 100. The control stage 130 is connected to the first terminal 110 of all connectors 300, and the other end of the connector 300 is grounded. This ensures that when each connector 300 is correctly connected to the corresponding via on the motherboard, the control stage 130 turns on the switching transistor 100; otherwise, the control stage 130 turns off the switching transistor 100.

[0053] In some embodiments, please refer to Figure 2 The motherboard assembly and testing system includes four load resistors 200. Each connector 300 is connected in series with one load resistor 200 and connected to the control stage 130. Each load resistor 200 is connected in parallel with any other load resistor 200. For example... Figure 1 As shown, the four load resistors 200 are R3, R4, R5 and R6, which are connected to ground through connectors 300TEST1 to TEST4 respectively.

[0054] In some embodiments, the motherboard assembly detection system includes a voltage divider resistor 400, such as Figure 1 As shown, the voltage divider resistor 400 is R2, and the control stage 130 is connected to the first terminal 110 through the voltage divider resistor 400.

[0055] Switch 100 has a threshold voltage. When the voltage difference between the control stage 130 and the first terminal 110 of switch 100 is greater than the threshold voltage, switch 100 is turned on; otherwise, switch 100 is turned off. When each connector 300 is correctly connected to the motherboard and is grounded, the voltage difference between the control stage 130 and the first terminal 110 of switch 100 is greater than the threshold voltage, causing switch 100 to turn on. When any connector 300 is not correctly connected to the motherboard and is not grounded, the voltage difference between the control stage 130 and the first terminal 110 of switch 100 is less than the threshold voltage, causing switch 100 to turn off.

[0056] The motherboard assembly and testing system includes a linear regulator 500, which converts an unstable input voltage into a stable output voltage. The linear regulator 500 includes an input terminal and an output terminal; the input terminal is connected to the power supply, and the output terminal is connected to the first terminal 110.

[0057] The motherboard assembly testing system includes a 600Ω current-limiting resistor, such as... Figure 1 As shown, the current-limiting resistor 600 is R1. One end of the current-limiting resistor 600 is connected to the output terminal of the linear regulator 500, and the other end is connected to the first terminal 110. The current-limiting resistor 600 is used to limit the magnitude of the current.

[0058] The motherboard assembly testing system includes a first filter capacitor 700 and a second filter capacitor 710. One end of the first filter capacitor 700 is connected to the input terminal of the linear regulator 500, and the other end is grounded to stabilize the voltage. The second filter capacitor 710 has one end connected to the output terminal of the linear regulator 500 and the other end grounded to stabilize the voltage.

[0059] The motherboard assembly testing system includes a diode 800, one end of which is connected to the control stage 130, and the other end is grounded to prevent static electricity.

[0060] Please refer to Figure 3 Some embodiments provide a motherboard assembly detection method, applied to the motherboard assembly detection system described above. In some embodiments, the motherboard assembly detection method is used to detect whether the motherboard is correctly connected to the connector 300. The motherboard assembly detection method may include the following steps.

[0061] Step S10: Initialize circuit parameters.

[0062] The threshold voltage of the switching transistor 100, the resistance value of the voltage divider resistor 400, and the resistance value of the load resistor 200 are set such that when each connector 300 is correctly connected to the motherboard, the voltage difference between the control stage 130 of the switching transistor 100 and the first terminal 110 is greater than the threshold voltage, and the switching transistor 100 is turned on; and when any connector 300 is not correctly connected to the motherboard, the connector 300 is not grounded, the voltage difference between the control stage 130 of the switching transistor 100 and the first terminal 110 is less than the threshold voltage, and the switching transistor 100 is turned off.

[0063] In some embodiments, the source voltage of switch 100 is set to 1.8V. The threshold voltage of switch 100 is set to -0.6V, the voltage divider resistor 400 is set to 130 ohms, and the load resistors 200R3 to R6 are set to 1000 ohms. When each connector 300 is correctly connected to the motherboard, the gate voltage of switch 100 is less than 1.2V, and the source voltage of switch 100 is 1.8V. Since the gate-source voltage of switch 100 meets the requirement of being less than -0.6V, switch 100 is turned on. When any connector 300 is not correctly connected to the motherboard, and that connector 300 is not grounded, the gate voltage of switch 100 is greater than 1.2V, and the source voltage of switch 100 is 1.8V. Since the gate-source voltage of switch 100 does not meet the requirement of being less than -0.6V, switch 100 is turned off.

[0064] Step S20: Connect each connector 300 to the motherboard.

[0065] In some embodiments, the motherboard can be a rectangular printed circuit board with precision circuitry, and the connector 300 can be a screw and a nut. The motherboard is fixed to the device housing via the connector 300. In some embodiments, the through-holes appropriately expose copper within the pressing area of ​​the connector 300. Because the motherboard is covered with insulating solder mask, the exposed copper area refers to the area not covered by the solder mask, directly exposing the copper of the motherboard, and this exposed copper is grounded. When the motherboard and the nut are pressed together, and the screw is driven into the nut through the through-hole of the motherboard, the motherboard and the connector 300 will be in a metallic conductive state, so that when the connector 300 is correctly connected to the corresponding through-hole of the motherboard, the connector 300 is grounded.

[0066] Step S30: Determine whether the motherboard is correctly connected to connector 300.

[0067] In some embodiments, it can be determined whether the motherboard is correctly connected to the connector 300 in the following two ways.

[0068] In some embodiments, it is determined whether the output voltage of the switching transistor 100 is greater than a threshold; if yes, it is determined that each connector 300 is correctly connected to the motherboard; if no, it is determined that at least one connector 300 is not correctly connected to the motherboard.

[0069] When each connector 300 is correctly connected to the motherboard and grounded, the voltage difference between the control stage 130 of the switching transistor 100 and its first terminal 110 is greater than the threshold voltage, causing the switching transistor 100 to conduct and output a high-level signal, with its output voltage exceeding the threshold. Conversely, if any connector 300 is not correctly connected to the motherboard and is not grounded, the voltage difference between the control stage 130 and its first terminal 110 is less than the threshold voltage, causing the switching transistor 100 to turn off and output a low-level signal, with its output voltage less than the threshold. Therefore, whether the output voltage of the switching transistor 100 exceeds a threshold can be used to determine if the motherboard is correctly connected to the connector 300.

[0070] In some embodiments, the second terminal 120 of the switching transistor 100 is connected to a chip 900, such that when the switching transistor 100 is turned on, the chip 900 operates normally, and when the switching transistor 100 is turned off, the chip 900 cannot operate normally. It is determined whether the chip 900 can operate normally; if yes, it is determined that each connector 300 is correctly connected to the motherboard; if not, it is determined that at least one connector 300 is not correctly connected to the motherboard.

[0071] When each connector 300 is correctly connected to the motherboard and grounded, the voltage difference between the control stage 130 of the switching transistor 100 and its first terminal 110 is greater than the threshold voltage, causing the switching transistor 100 to conduct and output a high level, allowing the chip 900 to function normally. Conversely, if any connector 300 is not correctly connected to the motherboard and is not grounded, the voltage difference between the control stage 130 of the switching transistor 100 and its first terminal 110 is less than the threshold voltage, causing the switching transistor 100 to turn off and output a low level, preventing the chip 900 from functioning correctly. Therefore, the correct connection between the motherboard and the connector 300 can be determined by checking whether the chip 900 is functioning correctly.

[0072] In practical applications, users can use a motherboard assembly detection method to check whether the motherboard is correctly connected to the connector 300. Users initialize circuit parameters, setting the threshold voltage of the switching transistor 100, the resistance value of the voltage divider resistor 400, and the resistance value of the load resistor 200. This ensures that when each connector 300 is correctly connected to the motherboard, the voltage difference between the control stage 130 of the switching transistor 100 and the first terminal 110 is greater than the threshold voltage, causing the switching transistor 100 to conduct. Conversely, if any connector 300 is not correctly connected to the motherboard, that connector 300 is not grounded, the voltage difference between the control stage 130 of the switching transistor 100 and the first terminal 110 is less than the threshold voltage, causing the switching transistor 100 to turn off. Each connector 300 is connected to the motherboard, and the user checks whether the motherboard is correctly connected to the connector 300. The user can determine this by checking if the output voltage of the switching transistor 100 is greater than a threshold voltage; if so, each connector 300 is correctly connected to the motherboard; otherwise, at least one connector 300 is not correctly connected to the motherboard. Users can connect the second terminal 120 of the switching transistor 100 to a chip 900, so that when the switching transistor 100 is turned on, the chip 900 works normally, and when the switching transistor 100 is turned off, the chip 900 does not work normally. The system determines whether the chip 900 works normally; if it does, it confirms that each connector 300 is correctly connected to the motherboard; if not, it confirms that at least one connector 300 is not correctly connected to the motherboard.

[0073] This invention discloses a motherboard assembly testing system and method. A switching transistor 100 is used, comprising a first terminal 110 for receiving input voltage, a second terminal 120 for providing output voltage, and a switching state control stage 130 for controlling the switching transistor 100. The control stage 130 connects to the first terminals 110 of all connectors 300, with the other terminals of the connectors 300 grounded. This ensures that when each connector 300 is correctly connected to its corresponding via on the motherboard, the control stage 130 turns on the switching transistor 100; otherwise, it turns it off. Finally, the output voltage of the switching transistor 100 is used to determine whether the motherboard is correctly connected to the connectors 300, thus avoiding technical problems such as product defects caused by improper assembly.

[0074] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A mainboard assembly detection system for determining whether a mainboard is properly connected to connectors, the mainboard comprising at least one through hole, each connector being configured to connect to one through hole, the connector being configured to achieve grounding when the connector is properly connected to the corresponding through hole; characterized in that, The mainboard assembly detection system comprises: a switch tube, comprising a first end, a second end and a control stage; the first end is connected to a power supply for receiving an input voltage; the second end is used for providing an output voltage, and the magnitude of the output voltage of the switch tube is used for judging whether the mainboard is correctly connected with the connecting pieces; the control stage is used for controlling the switching state of the switch tube; the control stage is used for connecting the first ends of all the connecting pieces, and the other ends of the connecting pieces are grounded, so that when each connecting piece is correctly connected to the corresponding through hole of the mainboard, the control stage makes the switch tube conductive, otherwise, the control stage makes the switch tube non-conductive.

2. The motherboard assembly detection system of claim 1, wherein, Further comprising: at least one load resistor, each connecting piece is connected in series with a load resistor and connected to the control stage, and each load resistor is connected in parallel with any other load resistor; a voltage dividing resistor, the control stage is connected to the first end through the voltage dividing resistor.

3. The mainboard assembly detection system of claim 2, wherein: the switch tube has a threshold voltage, when the voltage difference between the control stage of the switch tube and the first end is greater than the threshold voltage, the switch tube is conductive, otherwise, the switch tube is non-conductive; when each connecting piece is correctly connected to the mainboard, so that each connecting piece is grounded, the voltage difference between the control stage of the switch tube and the first end is greater than the threshold voltage, so that the switch tube is conductive; when there is any connecting piece not correctly connected to the mainboard, the connecting piece is not grounded, the voltage difference between the control stage of the switch tube and the first end is less than the threshold voltage, so that the switch tube is non-conductive.

4. The motherboard assembly detection system of claim 1, wherein, Further comprising: a linear voltage stabilizer for converting unstable input voltage into stable output voltage; the linear voltage stabilizer comprises an input end and an output end, the input end is connected to a power supply, and the output end is connected to the first end.

5. The motherboard assembly detection system of claim 4, wherein, Further comprising: a current limiting resistor, one end of the current limiting resistor is connected to the output end of the linear voltage stabilizer, and the other end is connected to the first end, and the current limiting resistor is used for limiting the magnitude of the current.

6. The motherboard assembly detection system of claim 4, wherein, Further comprising: a first filter capacitor, one end of the first filter capacitor is connected to the input end of the linear voltage stabilizer, and the other end is grounded, for stabilizing voltage; a second filter capacitor, one end of the second filter capacitor is connected to the output end of the linear voltage stabilizer, and the other end is grounded, for stabilizing voltage.

7. The motherboard assembly detection system of claim 1, wherein, Further comprising: a diode, one end of the diode is connected to the control stage, and the other end is grounded, for preventing static electricity.

8. A motherboard assembly detection method applied to the motherboard assembly detection system according to any one of claims 1-7, characterized in that, Comprising: connecting each connecting piece to the mainboard; judging whether the mainboard is correctly connected with the connecting pieces; the judging whether the mainboard is correctly connected with the connecting pieces comprises: judging whether the output voltage of the switch tube is greater than a threshold value; if yes, it is determined that each connecting piece is correctly connected to the mainboard; if no, it is determined that there is at least one connecting piece not correctly connected to the mainboard.

9. The mainboard assembly detection method of claim 8, wherein, Before the connecting each connecting piece to the mainboard, further comprising: The threshold voltage of the switch tube, the resistance of the voltage dividing resistor and the resistance of the load resistor are set so that when each connector is correctly connected to the main board, the voltage difference between the switch tube control stage and the first end is greater than the threshold voltage, and the switch tube is turned on; and when there is any connector that is not correctly connected to the main board, the connector is not grounded, the voltage difference between the switch tube control stage and the first end is less than the threshold voltage, and the switch tube is turned off.

10. The method of claim 8, wherein the detecting of the assembly of the main board comprises: detecting whether the main board is assembled based on the number of the detected components. The judging whether the main board is correctly connected with the connector includes: The second end of the switch tube is connected to a chip, so that when the switch tube is turned on, the chip works normally, and when the switch tube is turned off, the chip cannot work normally; Judging whether the chip can work normally; If yes, it is determined that each connector is correctly connected to the main board; If no, it is determined that there is at least one connector that is not correctly connected to the main board.

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