Thanks very much for your feedback. After trying the above out, it responded in the same way and did not power on. After a while of more countless tests i decided to surrender and take in to the local pc shop. They found out that it only powers on when out of the case... i know... how strange. They said it's something like the case is grounding the motherboard somewhere. Anyways, i'm replacing the case so the problem is solved :cheesy:
Unsolved 
