PC Not Turning On Repair Sheffield
Diagnose and fix a desktop PC that won't turn on, won't POST, or fails to boot - all components tested.
Why Won't My PC Turn On?
A desktop PC that won't turn on can fail at several different points - no response at all when pressing the power button, fans spin briefly then stop, or the system powers on but won't POST (no signal to the monitor, no Windows loading). Each symptom points to a different likely cause, and accurate diagnosis avoids unnecessary part replacements.
Common causes include a failed power supply, a faulty power switch header, a RAM seating issue, a dead CMOS battery causing no POST, a failed GPU preventing display, or in more serious cases a failed motherboard or CPU. We test systematically from the most likely and cheapest cause first.
See our full desktop PC repair page for all faults we cover.
What's Included
- Full power and startup diagnostic
- PSU testing under load
- RAM, GPU and header seating check
- CMOS battery test and replacement
- POST code and beep code diagnosis
- Motherboard and CPU assessment if required
Repair Pricing
- No power / no POST diagnosticFree
- CMOS battery replacementfrom £15
- RAM reseating and testfrom £19
- Power supply replacementfrom £39
- Motherboard-level diagnosisfrom £49
Prices depend on parts & work required. You'll get a clear quote before anything starts.
Free Diagnostics —
Pay Only If You Proceed
We check it, explain the issue, quote you — you decide. No obligation.
- Clear fix plan & quote before any work
- Same/next-day turnaround on common issues
- 1-month guarantee on all work
- Honest, jargon-free advice
What Customers Say
5.0 on Google
"Came to my house, took it with him and dropped it off 3 hours later after stripping it down and cleaning every bit. No more overheating!"
Poppy Cheetham
"Matt has always been patient and explained everything in a clear way. I don't know where I would be without his expertise."
Zachary Rhodes
"Called for my computer repairing because it wasn't turning on. They ran me through a few things and managed to fix it over the phone for nothing."
Jonathan Wright
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Need PC Not Turning On Repair Sheffield?
Most enquiries answered & quoted same day. No jargon, no surprises.
Free diagnostics·No fix, no fee·Sheffield & South Yorkshire