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. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Stop using the PSU immediately

Stop using the PSU immediately.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Replace the entire PSU — do not repair DIY

Replace the entire PSU — do not repair DIY.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Have a qualified technician inspect other components for damage

Have a qualified technician inspect other components for damage.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

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