Chosen Solution

Hi, The screen on my macbook slowly dies after about an our of use (because of the heat?), it has bars in the middle and slowly turns completely white as you can see on the pictures.

Do you have any ideas what the problem might be ? Thank you Edit :

Let’s first try an external monitor is the image clear on it? If it is that focuses us to the internal display You’ll need to inspect the LVDS cable and its connector on the logic board. Disconnect the cable following this guide MacBook Pro 13" Unibody Mid 2012 Display Replacement to Step 4, then jump down to Step 14 & 15. Take a clear picture of the logic boards connector and the cables contacts and post them here for us to see Adding images to an existing question Once we see whats up we can figure out the next steps.