A desktop technician is troubleshooting a CAD workstation that suffers from unpredictable system crashes under heavy processing load and occasional failure to power on. Upon inspecting the motherboard, the technician notes multiple distended capacitors with dried electrolyte residue situated around the CPU voltage regulator module (VRM). A simple power supply tester connected to the disconnected 24-pin ATX connector indicates that all voltage rails are operating within acceptable voltage tolerances under no load. Which TWO of the following actions should the technician take to resolve the root cause and maintain system reliability? (Select TWO.)
- Replace the motherboard to remedy the physical hardware failure in the onboard voltage regulation circuitry.Cevap
- BFlash the motherboard UEFI/BIOS firmware to reset CPU voltage control tables to factory defaults.
- Test the power supply under load or replace it to ensure improper power delivery does not damage new hardware.Cevap
- DSwap the system memory modules for high-density SO-DIMM modules to reduce heat production near the processor VRM.
Cevap
The technician should replace the motherboard to address the physical VRM capacitor failure and test or replace the power supply unit to prevent dirty power from damaging the replacement board.
Bulging or leaking capacitors indicate physical degradation of the motherboard's power distribution system, necessitating a motherboard replacement. Additionally, because basic PSU testers only measure static voltage without load, a power supply that delivers dirty power or excessive voltage ripple can cause capacitor failure and must be tested under full load or replaced alongside the motherboard.
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Motherboard component failure diagnosis and power supply load testing
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