One of the most common causes of a laptop screen not working is a corrupt system file that prevents the operating system from loading, resulting in a black or white screen. Restarting Windows can help to determine if this is a temporary issue that can be resolved with a simple reboot. If the problem persists, erasing the hard drive and reinstalling Windows may be necessary. The laptop screen not working, but an external monitor being functional can be attributed to operating system issues, such as Windows 8, 10, etc.
Downloading and installing the latest graphics drivers for your operating system, such as Windows 10, can help to determine if the monitor is working correctly. If a damaged graphics card is causing the issue, the laptop screen or monitor should work after this step. It's important to make sure that the computer isn't actually frozen. Check that all connected peripherals are functioning properly.
If something has been disconnected or has run out of batteries, it can give the illusion that the computer is freezing when it's actually just not receiving input. If all of these solutions fail and your laptop screen still isn't working, but an external monitor does, it may need to be replaced. If the warranty has expired, taking your laptop to a repair shop is your best option and should resolve the issue with the laptop screen not working, but an external monitor will. Once your computer starts up and the screen is functioning correctly, the repair is complete.
If this is the case, start diagnosing why there might be a disconnect between your computer and your screen (see also “How to repair a laptop screen”). If your laptop has been dropped or suffered any kind of shock or impact, it can cause physical damage to the screen or other components of the laptop and can also affect the laptop screen. Professional repairs are necessary to fix this problem and in some cases, buying a completely new unit may be necessary. If not, you can go to a computer parts supplier or a parts dealer certified by the laptop manufacturer and buy a replacement screen.
If you're on a tight budget and want to fix the problem yourself, there are some issues with the laptop screen that you can troubleshoot. If your laptop screen isn't working but you can see it on an external monitor, then the problem lies with the laptop screen and not with the laptop connection. If your warranty has expired, it's important to check if the problem is only with the laptop screen or with the laptop itself before doing anything else. We suggest bringing your laptop to get an exact replacement for the screen in order to avoid any risks associated with buying an incorrect one.
Laptops store data ranging from personal photos to documents needed for work so if it doesn't boot properly, it can be quite alarming as it won't be able to do what you need it to do. Other issues include problems charging, no image being displayed on the screen or not turning on at all.
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