Desktop POST Hardware System: heat-sensitive board component. Cooling, solder fatigue or internal degradation makes a board component unstable under load.

The distinguishing clue

Crashes appear at a repeatable temperature or workload.

Checks before an assessment

Record the exact POST light, beep or code and the motherboard model. Check the monitor input externally; do not treat a diagnostic light as proof that a named part is defective.

Stop point: Repeated part swapping with power connected can damage components.

Workshop confirmation and repair

Device-level check: Record codes and test minimum known-good hardware in a fixed order.

Targeted check: Log temperature, clock and power while testing cooling first. If confirmed: Repair cooling or replace the confirmed damaged component.

Repair boundary: Repair the confirmed memory, graphics, processor, firmware or board stage.

Related cause to rule out

When the computer works at light load but becomes unstable as demand changes, also consider Desktop Stuck at POST: Use Diagnostic Codes Without Guessing the Failed Part before choosing a repair.

Checks after the work

After repair or replacement, check cold boot, diagnostic indicators, full detection, restart and sleep.

For an AEPC repair assessment in East Auckland, provide the exact model and observed clue. Call 027 908 8880 before visiting the Burswood workshop.