I have just replaced the screen on an iPhone SE 2020.
Since the repair, the phone does not always "Wake-up" on the first attempt - the screen remains completely blank (except backlight is evident).
After a few attempts, the screen wakes-up and looks fine.
During the repair, it was necessary to transfer the front camera assembly etc.
Could this problem be related to damage to the ambient light sensor?
Can anyone offer any advise on what else may cause this problem?