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Fix a laptop screen that is black

We'll rule out external display mode, brightness, and sleep, then isolate backlight, cable, or panel failure—or tell you when to call a pro.

Troubleshooting · Home maintenance
10–25 min
What you'll need
  • External monitor and cable (to test)
Step 1 of 7

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Steps

Goal: Rule out brightness and display mode, then isolate backlight, cable, or panel failure.

Check brightness and wake

Goal: Rule out zero brightness and sleep.

  • Press Fn+brightness up. Move the mouse or press a key to wake from sleep.
  • Press Fn+F4 (or similar) to cycle display modes—the laptop may be in external-only.
  • Good: Screen comes on. If not, try an external monitor.
  • Bad: Still black—connect an external monitor.

Try external monitor

Goal: Determine whether the GPU works and the internal display failed.

  • Connect an external monitor via HDMI or USB-C. If it works, the internal display or cable has failed.
  • If the external also shows nothing, update display drivers and try Safe Mode.
  • Good: You have isolated the issue. External works = internal display repair needed—call a technician.
  • Bad: External does not work—GPU or driver issue.

When to get help

Call a technician if:

  • The external monitor works but the internal screen stays black.
  • You see a faint image with a flashlight (backlight failed).

Opening the laptop to repair the display cable or backlight requires a professional.

Verification

  • The internal screen displays the desktop.
  • Brightness is set correctly.
  • Display mode is laptop or duplicate (not external-only).

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Brightness and wake Fn+brightness up; wake from sleep; Fn+F4 for display mode.
  2. External monitor Connect external—if it works, internal display or cable failed.
  3. Power cycle and drivers Cold restart; update display drivers.
  4. Call a pro External works, internal black—display cable or backlight needs repair.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • Laptop model
  • Whether external monitor works
  • Faint image visible with flashlight (backlight test)
  • Steps already tried

Does the laptop show signs of power (LEDs, fans)?

If no power at all, check charging and power adapter.

Check caps lock LED, power LED, fans. Power on: screen issue—check brightness and display mode. No power: see fix-laptop-will-not-charge.

Yes No

You can change your answer later.

See fix-laptop-will-not-charge

No power—check charging and power adapter. See Fix a laptop that will not charge.

Done

Have you tried brightness and display mode?

Brightness at zero or external-only mode are common.

Press Fn+brightness up. Press Fn+F4 to cycle display modes. Wake from sleep. Good: screen comes on. Bad: try external monitor.

Yes No

You can change your answer later.

Does an external monitor work?

External working means GPU is fine; internal display or cable failed.

Connect external monitor. Works: internal display cable or backlight failed—call a technician. Does not work: GPU or system issue—update drivers, try Safe Mode.

Yes No

You can change your answer later.

Update drivers and try Safe Mode

Update display drivers. Boot in Safe Mode. If Safe Mode works, a driver or software conflict may cause the black screen.

Done

Call a technician

If external monitor works but internal screen stays black, the display cable or backlight needs repair. Opening the laptop requires a professional.

Done

Done

Screen working.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a laptop screen go black?
Brightness at zero, sleep mode, external-only display mode, loose display cable, failed backlight, or damaged panel. Check brightness and external monitor first.
Can I fix a laptop black screen myself?
Yes, for brightness and display mode. Press Fn+brightness, try external monitor, restart. Internal display cable or backlight repair usually needs a technician.
When should I call a technician for a black laptop screen?
If the laptop works with an external monitor but the internal screen stays black—the display cable or backlight may have failed. Opening the laptop to repair requires a professional.

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