Reball GPU and Display Adapter and flickering lines

Hi, i have a Nextgear gtune mouse i7900 laptop with gtx1080 graphic card , about a week ago I changed its silicon and unfortunately it gets overheat 95° and my screen flickering with horizontal lines , i send my laptop to repair center and they reball it 3 time , but flickering lines still there and nothing changed yet , in device manager my graphic driver set to microsoft basic display adapter and when I update it and install gtx1080 it’s installed with problem code 48, in adapter setting properties is only 4k Resolution with 64hrz frequency, now my question is this problem with gpu chip or something else ? And how can I fix this !?
I try hdmi port and it doesn’t work anymore

Thanks in advance