Computer Won’t Turn On: What to Try Before You Call a Repairer (2026)

If your computer won’t turn on, the fix can be a loose power cable, a flat laptop battery, or a failed component that needs a workshop. Work through the safe checks below before you pay for a call-out. Then find help via our repairer directory. This computer won’t turn on repair path is about not making a dead machine deader.

Desktop-specific faults: PC repair near me. Portables: laptop repair near me. Gaming towers: gaming PC repair.

Desktop PC: no lights, no fans

1. Confirm the wall socket works (lamp or phone charger test).
2. Reseat the power cable at the PSU and wall; check the rear PSU switch is on.
3. Try a different power lead if you have one (same kettle-lead type).
4. Strip USB devices and external drives; a shorted USB port can prevent boot.
5. Hold the power button 10 seconds, wait 30 seconds, try again.

Still dead after those checks? The PSU, motherboard or power button header may have failed. DIY PSU swaps are possible on standard towers; all-in-ones and compact brands commonly need a shop. So don’t keep flicking the switch fifty times. One clean power test is enough.

But if you smell burnt electronics or see scorch marks near the PSU, leave it unplugged. That’s a workshop job, not a “maybe the cable” job.

Laptop: no response when you press power

1. Leave it on charge 30 minutes with a known-good adapter (check the LED on the laptop if it has one).
2. Try a different wall outlet; inspect the charging port for looseness or burn marks.
3. Remove external monitors and USB hubs.
4. On models with a removable battery (rare now), unplug, hold power 30 seconds, reconnect power only.
5. Listen for a faint fan spin or USB light flicker; “dead” sometimes means “display only”.

No charging LED with a known-good charger? Suspect the port, board or battery path. Don’t force a bent USB-C plug harder. You can destroy the socket.

Fans spin but there’s no display

That’s a different fault from “fully dead”. Reseat the monitor cable, try another HDMI/DisplayPort input, and test with a spare screen if you have one. On desktops, reseating RAM one stick at a time (power off, unplug first) fixes a surprising number of no-POST cases. On laptops, external-monitor tests tell you whether the panel or the GPU path failed.

Beep codes matter. Write them down or record audio. Shops use those patterns. Blindly buying a new monitor when the GPU is dead wastes money; blindly buying a GPU when the cable was loose wastes more.

When to stop DIY and book repair

• Burning smell, smoke, or tripped safety switch
• Liquid spill, even if it “dried overnight”
• Laptop swollen at the bottom (possible battery)
• You’ve confirmed power at the wall and the machine still shows no life
• Data on the internal drive matters and you’re tempted to keep power-cycling a clicking disk

Bring the charger, note recent events (storm, drop, update), and ask for a written diagnostic fee policy. Fee language: no fix no fee explained. Estimate bands: computer repair cost Australia.

Photograph the desk setup before you unplug everything. Shops ask about recent storms, spills and pets chewing cables more than you expect. Those details change the first tests they run.

What shops test on a no-power job

Expect power-rail checks, known-good PSU or charger tests, board inspection, and sometimes current-draw measurement. Laptops may need the bottom cover off before anyone can say “port” vs “board”. Ask whether they’ll image the drive if the board is dead but storage might still be readable. A dead laptop isn’t always a dead hard drive or SSD.

Ask whether diagnosis includes a short written findings note. “No power rail on motherboard” is clearer than “needs more work” when you are deciding repair vs replace.

Frequently Asked Questions