I built a rig for a friend using this configuration :

ASRock Z170 Extreme3 (UEFI P2.00 if i remember good)
Intel i7-6700K

16GB DDR4 2400Mhz crucial ballistix
EVGA GTX 970 4GB OC
LDLC 650w 80+platinium (power tank/it's basically a rebranded seasonic)

Crucial BX200 240GB ssd

Seagate Baracuda 7200rpm 2TB

Cooler Master Storm Trooper case

First, when we got all the material, we couldn't get internet. simply, the ethernet port didn't work (yellow led, stucked, error 10 on windows device manager... nothing on linux too). we got the mainboard switched by the retail store, but when we pluged the new one, same problem.

Then the computer went mad. it had several random bsod (memory management, page fault in nonpaged area, acpi bios error...)

And now it simply wont boot (no logo after power on, black screen)

I dunno what to do, but most importantly i wanna know what i missed or what i could have done wrong, like an electrical fault or smtg else...

Please i really dunno what to do here... if the mainboard is screwed or if there's an unknown factory problem (which could be very unlucky) since i had the problem on two different z170 extreme3.

Thank you very much!

playfull

ps : i checked if there was a similar thread, and it isn't.