Custom PC Builds & Diagnostics
Built a PC that won't POST, won't display or won't install Windows? We diagnose and finish new custom builds, and can build a machine to your spec, across Leatherhead, Ashtead, Bookham, Cobham, Oxshott and Fetcham. £99 collection, diagnosis and return.
What Custom PC Build Help Covers
From a build that won't boot to a complete, cable-managed machine.
Building your first (or tenth) PC is hugely rewarding — until it won't POST, the display stays black, or Windows won't install. The cause is usually simple but can be almost impossible to spot without spare parts to test with.
We specialise in finishing and fixing custom builds. Whether you want us to diagnose a brand-new machine that won't boot, set up BIOS/XMP and Windows properly, or build the whole thing from your parts list, we've got it covered.
- New build won't POST — systematic diagnosis of no-power and no-POST faults
- No display / black screen — isolating GPU, RAM, cable and motherboard issues
- BIOS & UEFI setup — boot order, XMP/EXPO memory profiles and fan curves
- Windows installation — clean install, drivers and updates done properly
- Complete custom builds — we assemble and test your parts list from scratch
- Part compatibility advice — sanity-check your list before you buy
- Cable management — tidy, airflow-friendly wiring
- Stability testing — CPU, GPU, memory and thermal testing under load
- Overclocking & tuning — stable, safe performance tuning on request
- Upgrades — SSD, RAM, GPU and cooler fitment and setup
Why Builders Ask Us for Help
Five situations we sort out every week.
⚡ "I built a PC and it won't turn on at all"
Usually a missed front-panel connector, a power switch on the PSU, or a standoff shorting the board. We work through it methodically rather than randomly reseating everything.
🖥️ "It powers on but there's no display"
Often RAM not fully seated, a GPU power cable missed, or the monitor plugged into the motherboard instead of the GPU. We isolate the cause with known-good parts.
💿 "Windows won't install"
Common causes are an unformatted drive, the wrong boot mode (UEFI/legacy), or an unsupported USB stick. We set the BIOS correctly and install Windows cleanly with drivers.
🌡️ "It runs hot and loud, or crashes in games"
Cooler mounting, thermal paste, fan curves or XMP stability. We test under load and tune it so it's stable, cool and quiet.
🛒 "I want a PC built but don't trust myself with the parts"
We'll build your parts list from scratch, install Windows, set everything up and hand over a tested, tidy, ready-to-use machine.
What's Included in Custom PC Build Help
Methodical diagnostics and a properly finished machine.
New-build faults are frustrating because everything is new — so you can't tell what's broken. Our advantage is spare, known-good components to swap in, which turns a weekend of guesswork into a same-day diagnosis.
- Systematic no-POST diagnosis — using known-good parts to isolate the fault
- BIOS/UEFI configuration — boot settings, XMP/EXPO and fan control set correctly
- Clean Windows install — drivers, updates and essential setup completed
- Full stability testing — CPU, GPU, memory and thermals tested under load
- Assembly from scratch — careful mounting, cable management and airflow
- Compatibility checks — catch part conflicts before you spend money
- Honest fault reporting — we tell you which part failed and why
- Overclocking & tuning — optional, stable and safe
- 30-day workmanship warranty on our build and setup work
- Collection & delivery across the Surrey Hills
Why Builders Choose Us
Five reasons to trust us with your new build.
Door-to-Door Convenience
No posting your device away to a stranger. We collect from your door across Surrey, repair at our secure Leatherhead base, and return it fully tested. You speak directly to the engineer doing the work.
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We Have Spare Parts to Test With
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Built Tidy and Tested
Fixed Price £99 Service Fee
Free diagnosis and a fixed written quote before any work. You know the exact cost — parts, labour and delivery — before we start. No surprises.
30-Day Workmanship Warranty
Every repair is covered by our 30-day workmanship warranty, plus the manufacturer's warranty on the parts we fit. If a fault develops, we put it right free.
Our Custom PC Build Process
Six steps from boxes of parts to a tested, finished machine.
Call or WhatsApp
Phone 07762 809301 or send a WhatsApp with your make and model. We'll give you an instant indication and check what's needed at our secure base.
Free Diagnostic
We confirm the exact fault, explain your options and send a fixed written quote before any work begins. Diagnosis is included in the £99 door-to-door service fee.
Diagnose or Assemble
For a fault, we isolate the failing component with known-good parts. For a build, we assemble carefully with tidy cable management and correct airflow, then configure the BIOS.
Expert Repair
Our engineer carries out the custom pc builds at our secure base using the correct tools and quality-matched parts. Your device is logged, photographed and handled with care.
Full Testing
Everything is thoroughly tested before it goes home — not just the repaired fault, but the functions around it, so you don't get a second problem later.
Delivery & Warranty
We hand over the finished PC running Windows, with drivers installed and stability confirmed. Your 30-day workmanship warranty starts here.
Transparent Pricing
One simple, upfront fee covering collection, diagnosis and return — with no hidden charges.
Includes inspection, diagnosis, device pickup and return delivery across Surrey Hills.
- ✓ Evening & weekend collections at no extra charge
- ✓ Clear written quote before any work begins
- ✓ Components only added with your approval
- ✓ £50 fee only if the device cannot be fixed
Cobham • Oxshott • Ashtead • Fetcham • Great Bookham • Leatherhead
Custom PC Build Service Areas in Surrey
We build and diagnose PCs across Mole Valley and Elmbridge. Click your area for local details.
Postcode districts covered: KT11, KT21, KT22, KT23 & surrounding Surrey
Frequently Asked Questions About Custom PC Builds
What Surrey builders ask us most.