Power supply · critical

How to fixPSU-CAPACITOR-BULGE

PSU capacitor bulging/failure

What this error means

PSU capacitor bulging/failure is a critical-severity power supply unit (PSU) issue. Physical inspection reveals bulged or leaking electrolytic capacitors inside the power supply unit. Bulging capacitors are a sign of imminent catastrophic failure. A failing capacitor can cause voltage ripple, power rail instability, and complete PSU failure. In worst cases, capacitor failure can cause fire or damage downstream components. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 3 complete
01Stop using the PSU immediately
  1. Stop using the PSU immediately
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
02Replace the entire PSU — do not repair DIY
  1. Replace the entire PSU — do not repair DIY
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
03Have a qualified technician inspect other components for damage
  1. Have a qualified technician inspect other components for damage
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

Possible causes

  • Component aging (5+ years)
  • Chronic voltage instability
  • Manufacturing defect (capacitor plague era)