I built a friend a PC and it worked perfectly when I booted it into Windows at my house, bur now that he has it, it refuses to even POST. I have discarded faulty port, cable, PSU, PSU connections, RAM and CPU.
Any idea why it is not posting?
i5 9400F
RTX 2070
Asus PRIME Z390-P
16GB DDR4 3000MHz Team Group Vulcan (8x2)
EVGA 450BT 450W
500GB Kingston A400 SSD
1TB Seagate BarraCuda HDD