A laptop display not working can mean a fully black screen, a screen that lights for a second and goes dark, flickering lines, a cracked panel, or a screen that stays blank even though fans spin and lights glow. The cause ranges from a simple brightness slider to a failed panel.
The fastest way to split the possibilities is to connect an external monitor or TV. If the second screen shows the desktop, Windows and the laptop's brain are fine and the built-in panel or its cable is the suspect. If the second screen is also blank, the laptop is not starting properly. Both routes are below, plus HDMI troubleshooting when the external screen will not pick up a signal.
Common causes
1Brightness at zero or screen switched off by a key
How to tellFaint image visible when you shine a torch at the screen at an angle
What fixes itPress the brightness up key, or the key that toggles the display
2Laptop is asleep or hung, not off
How to tellPower light is on, fans run or the caps lock key light still responds
What fixes itpress and hold power until the laptop is off, then start again
3Graphics driver crash after an update
How to tellScreen went black during or after an update; external monitor may also fail
What fixes itRestart; use Win + Ctrl + Shift + B to wake the display driver
4Wrong output chosen or projection mode
How to tellLaptop screen blank only after a monitor or TV was plugged in
What fixes itPress Win + P and choose PC screen only
5Loose RAM or a drained battery state
How to tellNothing on screen, repeated beeps or blinking lights on start-up
What fixes itUnplug, hold the power button, then charge for thirty minutes and start
6Display cable or panel failure
How to tellScreen flickers when the lid moves, has lines, a crack, or is dark only on the laptop
What fixes itTechnician replaces the cable or the screen; use an external monitor meanwhile
How to fix it, step by step
Check brightness and the display key
Press the brightness up key several times, and look closely at the screen with a torch for a faint image. Some laptops have a key that switches the screen off and on. Also check that the laptop is really on, not just charging, by looking at the power and caps lock lights.
Force a restart
Hold down the power key until every light has gone dark. Wait a short time, unplug the charger, and start the laptop again. This cures a hung system and a stuck sleep state.
Try the wake-the-display shortcut
On Windows, press Windows key + Ctrl + Shift + B. You should hear a beep and the screen may blink back. It restarts the graphics driver without losing your work.
Switch the projection mode
Press Windows key + P then use the arrow key to pick PC screen only, and press Enter. If you cannot see the menu, press the keys blind, since the list opens in the same order each time. A previous TV or projector connection often leaves the laptop screen switched off.
Connect an external monitor or TV
Use an HDMI cable, plug the other end into a monitor or a TV, and choose the right input on it. If the desktop shows there, the laptop is alive and the built-in panel or its cable is at fault. If you see nothing on either screen, go to the next step.
Drain power and reseat the battery state
Unplug the charger and any USB devices, and hold the power button for thirty seconds. Plug the charger back and wait half an hour before starting. Do not open the case or remove an internal battery unless you are trained, because that can void warranty and is risky.
Boot to recovery or Safe Mode
Turn the laptop on and off three times with the power button as soon as the logo shows. Windows then opens recovery options. From there choose Troubleshoot, then Startup Settings, and Safe Mode. If the screen works there, a graphics driver or an update is the cause.
Roll back or reinstall the graphics driver
In Safe Mode, open Device Manager, expand Display adapters, open Properties for each entry and choose Roll Back Driver, or remove it with Uninstall device and reboot. Afterwards run Windows Update to get a current, tested driver.
Is the laptop display not working, or the whole laptop?
Five quick checks decide this. First, does the caps lock light respond when you tap the key? Second, do you hear fans or the start-up sound? Third, does an external monitor show anything? Fourth, can you see a faint picture with a torch? Fifth, does the power light blink in a repeating pattern? If lights and fans respond, the laptop is running and the display path is the problem. If nothing responds at all, you are dealing with power, as covered in laptop not working.
You open the lid and the screen stays black, but the keyboard backlight is on and an external monitor shows the desktop. The laptop is fine and the screen panel or its cable needs a technician.
HDMI not working on a laptop
When the HDMI port or cable is the thing that fails, the external screen says no signal. Try this order: reseat both ends of the cable, choose the right input on the TV, try another cable, then press Windows key + P and choose Duplicate or Extend. Restart the laptop with the cable already connected. Test the same cable on another device; if it also fails there, the cable is bad. Cheap cables often fail, and bent ports are common on laptops carried every day. A port with a loose centre or damaged pins needs a technician. If you suspect that the graphics is not the issue but the power state, also see USB port not working for the similar port checks.
Flickering, lines, dim display and touch screen faults
| What you see | Usual reason | Try |
|---|---|---|
| Flicker only in Windows | Graphics driver or refresh rate | Update driver; reset refresh rate |
| Flicker when lid moves | Worn display cable at hinge | Technician |
| Vertical coloured lines | Damaged panel | Replace screen |
| Very dark image | Backlight or brightness | See brightness not working |
| Touch does nothing | Touch driver or setting | Restart; check Device Manager for HID touch screen |
When the screen needs repair and what it costs depends on
A cracked or lined panel, a dim screen that an external monitor proves is hardware, or a flicker linked to the hinge all need a technician. The price depends on the screen size, whether it is touch, the panel type and whether the part is available for your model. A cable-only job costs far less than a new panel, so ask for the fault to be confirmed first. Meanwhile an external monitor keeps you working.
Do not press on a cracked screen or try to peel it. Liquid crystal can leak, and glass can cut. Back up important files to a drive or cloud first if you can.
Frequently asked questions
Why is my laptop screen black but the power light is on?
The laptop may be asleep or hung, the brightness may be at zero, or the display path has failed. Force a restart, check brightness and test with an external monitor.
How do I check if the laptop display is the problem?
Connect an external monitor with HDMI. If the desktop appears there, the built-in screen or its cable is faulty. If not, the problem lies elsewhere in the laptop.
Why does the HDMI port on my laptop show no signal?
Check the cable, the TV input, and the projection mode with Windows key + P. Test the cable on another device. A damaged port needs a technician.
Can a driver update turn the screen black?
Yes, sometimes. Start in Safe Mode and roll back or reinstall the display driver.
Why is my laptop touch screen not working?
Restart first, then check the HID-compliant touch screen entry in Device Manager and enable it. A screen cleaned with a damp cloth that is wet can also misbehave, so dry it.