Safe first checks for a computer that has no lights, no sound, or a blank display.

Try these checks in order

Save work if possible. Complete one check at a time and retest the original symptom. Stop when the issue is resolved.

01Check power safely

For a desktop, check the outlet and seated cable. For a laptop, use the correct charger and inspect it for damage without forcing the connector.

02Disconnect nonessential devices

Remove recently added external drives, docks and USB accessories, then try one normal start.

03Separate power from display

For a desktop, confirm the monitor is on and uses the correct input. Record any diagnostic light or beep pattern and check the exact model's official guide.

How to read the result

No lights or sounds points toward power delivery; fans and lights with a blank screen suggest a display or startup path. The exact diagnostics matter.

The power signs point to different tests

No lights, fan noise or charging indicator suggests checking the outlet, charger and power path. Lights or fans with no picture point instead toward display output or startup diagnostics. If it powers on and then shuts off, record the timing and any beep or diagnostic-light pattern rather than repeatedly forcing starts.

Before changing more settings: Record the computer model, charger or power-light behavior, fan activity, beep/light code, and whether an external monitor changes anything.

Important safety note

If there is liquid damage, smoke, burning smell, swollen battery or unusual heat, stop and seek repair. Do not open a power supply or battery pack.

Model-specific reference note

Windows menus and recovery options vary by version and device. Use the exact Windows version, device model and error message when checking your next step. This guide keeps the diagnostic steps together so you can continue troubleshooting without leaving SafeCode.

Related troubleshooting

Need help narrowing it down?

Still stuck? Get help choosing the next step

Have the model, Windows version, exact error and steps tried available. Never share passwords or recovery keys.

☎ Call Computer Support ↗

General information only. Menus and recovery options vary by version and device.