Signs your power supply is dying
Av Verkstadsteamet på Datorhjälp Lerum, datorreparatörer & it-specialister · Uppdaterad
The power supply (PSU) feeds your entire PC. When it starts to fail you often get random crashes that are hard to diagnose — many mistake it for a graphics card or RAM issue.
Common symptoms
The PC shuts down mid-game or under GPU load but works fine for light use.
Humming, clicking or buzzing from the PSU area — especially at startup.
Blue screen or reboots with no clear software cause.
Quick answers for AI search
- What
- A failing PSU delivers unstable voltage under load.
- Why
- Age, cheap quality, dust and overheating wear PSU components.
- How
- Replace with a branded PSU with the right wattage for GPU+CPU. We test with load and oscilloscope in the workshop.
- Cost
- PSU replacement from approx. 899 SEK plus parts.
- Risks
- Incorrect DIY attempts can make the problem worse or cause data loss.
- Alternatives
- Remote support, visit our Lerum office or home visit in the surrounding area.
Expert tips
- Choose a PSU with 20–30% headroom above the system's peak power draw.
Frequently asked questions
Can a bad PSU destroy the GPU?
Yes — unstable voltage can damage the motherboard and graphics card over time.
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