Lol, now that’s weird! Maybe it was a bios issue ? If it’s not the GPU it should be the motherboard?
Or perhaps you where using the build in GPU of the motherboard?
Or maybe you really are unlucky ;-))
I had something similar, it was cause of the GPU, had to replace it.
I think this is the bad place.
Just give it three more months.
Two wrongs clearly don’t make a right!