It's, as I said in the first post, an acers motherboard (eMachines ET1850).
Ive tried burning AMIBOOT.ROM on cd and pressing ctrl+winkey on boot both before powering up and right after powering up. No luck.
As for tiggers answer, no, hotflashing is not possible as the chip is soldered in to the motherboard, also as I previously said in my first post.
I contacted the shop where i bought the comp. and they said the warranty was not anymore valid because i opened the case? So to "repair" it (they would just replace the mobo) it would cost me the mobo (~100€) + the service and shipping (another 100€). And no, buying the mobo isn't possible as they dont expect customers to open their computers cases? WHAT?
So im back to square one...
Oh and please read my post entirely before suggesting something ive already tried or noted.