Desktop Motherboard Power System: corrosion on board circuits. Conductive residue eats traces and bridges fine components.

The distinguishing clue

Several unrelated intermittent symptoms develop after moisture exposure.

Checks before an assessment

Describe no response, brief fan movement or repeated restarts separately. Do not open the PSU, bridge pins or reuse uncertain modular power cables.

Stop point: Power must be disconnected before moving cards or board connectors.

Workshop confirmation and repair

Device-level check: Compare a known power supply, inspect connectors and trace the board power sequence.

Targeted check: Map the contamination area and inspect affected rails before power. If confirmed: Clean and rebuild repairable traces or replace unsafe board sections.

Repair boundary: Repair the confirmed connector, regulator, rail or downstream short.

Related cause to rule out

When one rail or channel is absent while neighbouring stages work, also consider Desktop Motherboard Power System: open circuit or connection before choosing a repair.

Checks after the work

After repair or replacement, check cold start, processor load, graphics load, standby and shutdown.

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