It might have been a bit too short in the oven as 180 is a bit low, from what I read 200 for 10-15min was the initial recommendation coming from FP2 experience.
Hey @Vange
I can totally understand your frustration. The same happend to the motherboard of my FP3 two weeks ago.
I already had an Idea why this happened (which I will elaborate on below) and tried to reflow the motherboard as explained here for the FP2 and tadaaa - after I put the motherboard in my oven at approx. 200°C for 10-15 min. it worked again