Dead BIOS Acer Predator / MS-7829 , REV 1.1

Hello i need help to repair desktop pc.

Computer is acer predator g3-605

http://www.acer.nl/ac/nl/NL/content/model/DT.SQYEH.017

I updated bios from official website ( i made backup before it)
After update i saw once bios menu with visible only 1 GB ( from 8 GB ),
after restart i hear only one long beep sound from speaker and cd rom look for cd.
No screen reaction. Cmos also cleared, no reaction.

I used method with puting AMIBIOS.ROM on CD/flash , doesn`t work .


Motherboard model is MICRO STAR Model : MS-7829 , REV 1.1

Please help me to fix this computer , because i have no idea how to repair this and i spend all my cash for this new pc with was working 2 days.

Regards!