Since yesterday my screen suddenly stays black.
I can see it turns on when i push the power button but it stays black.
Also unlocking still works, i can stil feel the vibrations.
Ive already turned it of and removed the battery but it doesn’t matter.
Does anyone have any tips?
Welcome to the Community Forum.
This somewhat sounds like what happened to an FP4 I have here and whose display I disconnected and reconnected repeatedly. Eventually, the connector and/or its counterpart on the mainboard was so worn out that the display only shows background light. You might still want to carefully try to connect the display connector anew, paying attention to the iFixit instructions here:
When your phone is turned on, press on different areas of the screen and see if that makes any difference.
Have a good look at the sides of the phone. Perhaps it came a bit loose, so you have to re-attach it.
Or you need to dismantle the phone and see if the connector of the screen is still thightend.
manual Fairphone 4 screen replacement
Fairphone warns against pressing on the middle of the connector. Press on the sides of the connector.