Gaming PC Repair
Gaming PC Power Supply Replacement
A failing power supply is a common cause of gaming PC instability — random restarts, won't power on, USB devices cutting out, or a clicking sound from the PSU chassis. At Mr Gadget in Rickmansworth we diagnose and replace gaming PC power supplies from 550W to 1600W across ATX, SFX, and SFX-L form factors.
We use a PSU tester to confirm the unit has failed before recommending replacement, ruling out motherboard power button shorts or PCIe connector issues. Replacement units are chosen to match or exceed the system's power requirements with appropriate headroom, and we verify all voltage rails are stable under a full-system load test. All PSU replacements carry a 12-month warranty.
Book This Repair →Common Symptoms
Do Any of These Sound Familiar?
These are the exact phrases our customers search for before they visit us — if you recognise any of them, bring your device in for a free assessment.
Walk in Mon–Sat 9am–5pm or book your repair online. No appointment needed.
Why Mr Gadget
What Makes Us Different
We test output rails with a multimeter before recommending replacement.
Power supply replacements are usually completed the same day.
Full parts and labour warranty on replacement PSUs.
We run the system under full load to verify stable power delivery after the repair.
How It Works
Our Repair Process
Bring your console or PC to our Rickmansworth store.
We voltage-test the PSU to confirm it is the source of the fault.
A compatible replacement unit is fitted and all connectors secured.
The system is run under full load to verify stable power delivery.
Areas We Cover
Serving 24 Local Towns
Based in Rickmansworth, we serve customers from across South West Hertfordshire and North West London. Click your nearest town to see all available repairs and town-specific pages.
✓Rickmansworth▼
✓Watford▼
✓Chorleywood▼
✓Croxley Green▼
✓Northwood▼
✓Harefield▼
✓Chalfont St Peter▼
✓Bushey▼
✓Moor Park▼
✓Pinner▼
✓Harrow▼
✓Gerrards Cross▼
✓Leavesden▼
✓Garston▼
✓Ruislip▼
✓Kings Langley▼
✓Abbots Langley▼
✓South Oxhey▼
✓Denham▼
✓Carpenders Park▼
✓Maple Cross▼
✓Mill End▼
✓Northwood Hills▼
FAQ
Frequently Asked Questions
We use a PSU tester to measure all output voltage rails before recommending replacement.
Yes — a PSU that delivers unstable voltages can damage the motherboard, GPU, or storage drives. Prompt replacement is important.
We calculate total system wattage including GPU TDP headroom and recommend a PSU with appropriate overhead from a reputable manufacturer.
Typically 1–2 hours including testing.
All replacement PSUs carry a 12-month warranty.
Ready to Get Your Gaming PC Fixed?
Walk in Mon–Sat 9am–5pm — no appointment needed. Or book online, call us, or message on WhatsApp.
Book Online WhatsApp 07711 272860 📞 01923 934966