Well, I guess they are a bit special.. I tried with the amitool and now I have a nice black brick on my desk ;-) Anyone knows how to recover the BIOS? amiboot.rom is not working on this one :-/
After doing some digging it turns out that the bios is faulty to begin with. There something wrong with the advanced cool and quiet c1 function which well prevent the computer from restarting if its turned on. Nothing either of would have known.