“It won’t turn on” is the single most common phone call we get at our Nottingham workshop — and in more than half of cases, the machine isn’t dead at all. Before you assume the worst, work through this checklist. It’s the same order we check things at the bench.
First: is it truly dead, or just not displaying?
These are two very different faults. Truly dead means no lights, no fans, no sounds at all. Powering but no display means you hear fans or see lights, but the screen stays black. Note which one you have — it decides everything below.
If it’s truly dead: check the power chain
Work outward from the wall. Try a different socket (not an extension lead). Check both ends of the power cable are fully seated — kettle leads work loose more often than you’d think. On a desktop, check the power supply’s rocker switch on the back is set to I, not O. On a laptop, look for the charging light with the charger plugged in: no light usually means a failed charger or charging port, not a dead laptop — both cheap repairs.
The laptop hard-reset trick
Laptops sometimes get stuck in a power state where they simply won’t respond. Unplug the charger, remove the battery if it’s removable, then hold the power button down for a full 30 seconds. Reconnect power only (no battery) and try again. This one trick resurrects a surprising number of “dead” laptops.
If it powers on but shows nothing
Check the monitor first — is it on, and is the cable in the right port? If your PC has a graphics card, the monitor must be plugged into the card’s ports (lower down the back), not the motherboard’s. Listen for beeps or watch for blinking light patterns when you switch on: those are diagnostic codes, and they most often point to RAM. Reseating the RAM sticks fixes a lot of no-display faults — but only open the case if you’re comfortable doing so.
What the symptoms usually mean
Fans spin at full blast with no display: RAM or graphics card. Powers on for a second then dies: short circuit or power supply. Repeated clicking from inside: a drive in trouble — stop powering it on and get it looked at before things get worse. Burning smell: unplug it now and don’t try again.
Your files are almost certainly fine
The most important thing to know: a PC that won’t turn on has usually not lost its data. The storage drive is often healthy even when the rest of the machine isn’t, and we transfer files from dead machines to replacement drives every week. Don’t let anyone tell you it’s all gone without checking.
When to bring it in
If the checklist above doesn’t wake it up, the fault is usually the power supply, motherboard or RAM — all bench jobs. Diagnosis at our workshop is free with a fixed quote before any work starts, laptops included via our laptop repair service. And if the honest answer is that it’s not worth fixing, we’ll say so and rescue your files instead.
Quick answers
Why does my PC turn on but show no display?
Usually RAM, the graphics card, or a monitor cable in the wrong port — it's one of the most common and most fixable faults we see.
Is my data gone if the PC won't turn on?
Usually not. The storage drive is often healthy even when the PC isn't, and files can be transferred to a replacement drive or machine. A failed drive is a different job — we'll tell you honestly what's realistic.
How much does it cost to find out what's wrong?
Nothing at our workshop — diagnosis is free and you get a fixed quote before any work starts.