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FP3 black screen / problems with background light on screen

Hi there,

since about some hours (no external influence!) I don’t have any background light on the screen on my FP3 anymore. So I can basically only see a black screen anymore.
With a strong flashlight I can see that the screen beside of that works well.
I’ve opened it, removed the screen and the top module, cleaned, checked the connections and so on… Nothing helped.

The service test says “Proximity switch not detected”. Could that be the reason for this issue? Is it the screen or the top module?

Thanks a lot for your help

Best regards
Laurids

The proximity sensor is in the top module. (Fairphone 3 Teardown - iFixit)