Desktop PSU Replacement & Upgrade Portsmouth
Computer won't turn on? Random shutdowns? Burning smell? Your power supply may be failing. We diagnose, replace, and upgrade desktop PSUs for all makes and models. Collection and delivery available for £10 each way, or drop off at our workshop. 6-month labour warranty, 12-month manufacturer warranty on new parts.
28+
Years Experience
4.7★
Google Rating
6mo
Warranty on Repairs
£20
Diagnostics
6-Month Warranty
On all repairs
Collection & Delivery
£10 each way, or drop off at our workshop
Student & NHS Discount
On all services
4.7★ Google Rating
Trusted locally
Desktop PSU Replacement & Upgrade Portsmouth
PSU Diagnosis & Replacement
We test your power supply under load to confirm it's the culprit, then replace it with a quality unit from Corsair, Seasonic, EVGA, or similar reputable brands.
PSU Upgrade
Upgrading your graphics card or adding components? We upgrade your PSU to handle the increased power draw — preventing instability, random reboots, and potential damage to other components.
Modular Cable Management
We install fully or semi-modular PSUs with clean cable routing — improving airflow, reducing temperatures, and making future upgrades easier.
Power Protection
We can add surge protection and UPS (uninterruptible power supply) recommendations to protect your desktop from power spikes, dips, and outages.
What's Included
Collection & delivery — £10 each way, or drop off at workshop
Standard service included — cooling clean & thermal paste
6-month labour warranty, 12-month manufacturer warranty on new parts on all repairs
Student & NHS discount available
Fixed fee pricing — no hidden costs
Need This Repair? We'll Come to You.
Collection and delivery across Portsmouth — £10 each way, or drop off at our workshop. Student and NHS discount available. 6-month labour warranty, 12-month manufacturer warranty on new parts on every repair.
Or call us now: 02392 733 174
Common Questions
Frequently Asked Questions
How do I know if my PSU is failing?
Common signs: PC won't turn on, random shutdowns or reboots, burning smell, fan making unusual noises, system instability under load. If you're experiencing any of these, get it checked immediately — a failing PSU can damage other components.
What wattage PSU do I need?
For basic office PCs: 400–500W. For gaming PCs: 600–850W depending on the graphics card. For high-end workstations: 850W+. We calculate the exact power draw of your components and recommend the right PSU with headroom.
Can a bad PSU damage other components?
Yes. A failing power supply can send inconsistent or excessive voltage to your motherboard, CPU, GPU, and storage — potentially destroying them. If you suspect a PSU issue, don't keep using the computer.
Why Choose Our PSU Service?
A failing power supply causes random shutdowns, reboots, and can even damage other components. We diagnose whether your PSU is the culprit using professional load testing equipment — not just a multimeter check. If it needs replacing, we'll recommend the right wattage and efficiency rating for your system, whether that's a basic office PC or a high-end gaming rig.
Upgrading your PSU is also essential when adding power-hungry components like a new GPU. We ensure proper cable management, verify all voltage rails are within spec, and stress-test the complete system under load before returning it.
Professional PSU load testing — we verify under real conditions
Wattage and efficiency recommendations based on your system
Proper cable management included
Voltage rail verification under load
Full system stress test after installation
Book a Repair
Tell us about your device and the problem — we'll come back to you quickly with a clear quote and timeframe.
Contact Details
Call Us
02392 733 174Email Us
info@19computing.co.ukOur Workshop
Unit 4, Terminus Industrial Estate, Durham Street, Portsmouth PO1 1NR
Hours
Mon–Sat: 9am–5pm
Closed Sunday & Bank Holidays
Collection & delivery — £10 each way, or drop off at workshop
Our Repair Guarantee
Every repair includes our standard service package: cooling path clean, thermal paste replacement, and performance check — at no extra charge. 6-month labour warranty, 12-month manufacturer warranty on new parts on all repairs.