I left my phone "S8" inside gear vr for 30 min now nothing is working

i left my phone "S8" inside gear vr under my bed cover for 30 min then when i came back nothing is displayed only a black screen with a small x at the corner, i tried my phone with my friends gear its working so it isnt a software issue.

could it be the approximate sensor bricked ?

i've tried opening the device and reconnect everything to the mother board but still nothing is working

i've searched the net didnt find similar problem.