Win 10 / 11 · Maintenance

PC won't turn on? Run the five-minute power check

A completely dark PC is usually one boring thing — a socket, a switch, or a stuck power state. Five minutes of checks separates 'dead' from 'just asleep', and nothing here can damage the machine.

DifficultyEasy
Time5 min
RiskLow
ReversibleYes
PlatformWin 10 / 11
UpdatedAug 19, 2026

Written and tested by emdottech

What that means

Low risk. This fix only checks things, or changes settings you can switch back in the same place. This change is reversible — you can return to the previous state without professional help or data loss.

The five-minute dead PC check — socket, cable and PSU rocker switch first, then the standby light to tell a display problem from a dead one, laptop charger LED and battery boot, and a 30-second unplug plus 15-second power-hold drain

Steps

01
- Check the boring stuff first: wall socket (try another), power cable firmly seated at both ends, and that little O/I rocker switch on the back of the PSU — half of all 'dead PC' calls end here
02
- Look for a standby light on the case or front panel. On with no display = it's alive, this is now a display problem; off = keep going down this list
03
- Laptop: check the charger's indicator and try booting on battery alone (unplug AC). A dead charge path masquerades as a dead PC
04
- Full discharge reset: power off, unplug everything removable for 30 seconds, hold the power button 15 seconds to drain residual charge, then reconnect one cable at a time and try again — stuck electrical states look exactly like death and die with them

How to verify the fix

The PC powers on — standby light comes on, fans spin, and it reaches the boot screen or desktop.

If this didn't fix it

Still no sign of life after outlet, cable, PSU switch and full-discharge checks — that's a power-supply or motherboard fault; stop here and get professional help rather than opening the case blind. If it powers on but shows no display, move to 'Black screen? Check the display signal path first'.

Next stop: the related fixes below, or start a guided diagnosis.

Still stuck? Diagnose my problem Browse all Windows fixes

PC won't turn on? Run the five-minute power check

Steps

✓How to verify the fix

!If this didn't fix it

Related fixes

How to verify the fix

If this didn't fix it