Chosen Solution
My screen is cracked bottom left, and top right corners. The screen touch works fine but the screen goes black simetimes, except the top 1/2 cm works. The screen always works when I tap once to turn on the screen saver. The screen works sometimes and it flickers sometimes too. I don’t want to replace the screen.
Hi @samgr, What’s your alternative? Cracks in screen and backlight problems suggest internal problems in the screen. Screen saver probably works more often because you’re not tapping the screen If faulty, display assemblies cannot be fixed, they have to be replaced. As a DIY repair all you can do is to temporarily replace the screen and check if it now works OK. This is just to see if the problem was in the screen only, in the systemboard or both. Here’s the ifixit Samsung Galaxy S21 Ultra Repair guide that may help.
As @jayeff says, you need a new screen. You answered your own question when you said it was damaged. If you don’t want to spend hundreds on a new screen see if there is a spares or repair on eBay with a good screen and swap the board over.
