Changing broken screen on a Laptop.

Hi @benceboldizsar

Was the old screen still working to a degree i.e. it still showed some images etc even though it was broken before you replaced it?

Did you disconnect the battery from the motherboard before attempting to remove/replace the screen?

Try the following and check what results you get:

Disconnect the battery and reinstall the new screen (if not already installed) and then reconnect the battery and turn on the laptop, wait for a minute or so to give it time to boot into the OS and then shine a flashlight at an angle close to the screen and check if you can see any images on the screen.

They will be very faint if they are there so trying this in a darkened room may help.

If you can see images then there's a backlight problem with the display.

If the original display was still sort of working OK and you didn't disconnect the battery before removing/replacing it then perhaps the backlight power fuse or power mosfet may have blown or was damaged, (not sure which as i don't know which motherboard you have)

What is the model number of the motherboard, as shown on the board itself? The motherboard schematics would be needed to be found so that the backlight power circuit could be checked to see what's wrong.

If you did disconnect the battery and there are images seen with a flashlight then the schematics would still be needed.