Diagnosis method and device for electrifying fault of computer motherboard

Abstract

The invention provides diagnosis method and device for an electrifying fault of a computer motherboard. The method comprises the steps of supplying power to the motherboard and determining whether a programmable logic chip works; if so, outputting at least one enable signal which is sequenced according to a preset time sequence according to the connection condition of the programmable logic chip and a plurality of power conversion chips so as to enable the power conversion chips to work; detecting level switching signals output by the plurality of power conversion chips through the programmable logic chip; determining the work from a circuit which generate the at least one enable signal to circuits between the successful level conversion signals of the corresponding power conversion chips is normal if the level conversion signals are valid, and otherwise, determining that the fault occurs in the circuit section. With the adoption of the diagnosis method for the electrifying fault of the computer motherboard, the difficulty and workload at the repair of the motherboard can be greatly decreased; the diagnosis method is fast and convenient; the fault can be accurately located to the level of some circuit generating the level signal.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a method and device for diagnosing electrical faults on a computer motherboard. Background technique [0002] In the field of computer motherboard repair, usually for the motherboard sent to the repair station, the maintenance personnel are most worried about the situation that the motherboard cannot be powered on, that is, after pressing the power button, the entire motherboard does not respond, making the maintenance personnel unable to start. This type of motherboard failure can usually be ruled out to be caused by software, including firmware, because before sending it to the repair station, the technicians will first try to reprogram the basic input and output system (referred to as BIOS) in the face of the problem that the computer cannot be turned on. , the firmware of the programmable logic chip, etc., will be sent to the maintenance station when the problem still canno...

AI Technical Summary

Problems solved by technology

However, the technology of using the boundary scan circuit to diagnose the power-on failure of the motherboard has not yet appeared.

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