This solution didn't work. A friend though suggested pressing F8 while turning the system on and it started working again.   I'm baffled that Dell whatsapp assistance advised me to basically disassemble my pc and run tests before giving me this tip, that for some may be obvious but for me it wasn't.
Today I recieved my Aurora R10 Ryzen Edition after a long wait. I used it for a few hours and everything was going fine. I then updated the drivers from your website and I was asked to restart the PC. So I did but after shutting down the PC never managed to restart. The Alienware logo flashes white 2 times and then white 1 time. I left it there for hours and the flashes continue. On this forum I found the advice to detach all peripherals, detach the power cable, hold the power button for one minute and then reattach everything. This didn't work though and I'm still experiencing the same problem. Needless to say that after spending 3k euros on this PC and waiting for over a month to have it I'm extremely disappointed. I've already lost a lot of time in a period which is personally very busy work-wise trying to fix this but I hope that there's a solution which doesn't involve sending the PC back.
Aurora R10, new, won't start up after driver update