malolin,
Based on your story, i am not sure at all, this is a (simple) fw problem.
Yes, it can be fw problem as well, but usually this comes from another problem, like head malfuction or similar.
Anyway try this steps:
remove the PCB from the HDA, and power up this one only!
Wait 10 minute, than press CTRL-ALT-DEL and let see what happens in the bios!
I am curious you will have to find the same thing....

if you want to read some general info/warning, read this topic:
results-the-yourself-solutions-t11912.htmlplease keep as informed....
Janos