I have a barebone from a friend here that I am finishing up for him. All parts were assembled and when I turn on power everything seems fine, but then nothing appears on the screen except for blackness. I thought maybe it was the RAM so I took it out and put in my computer I am on now, and it booted. So next I took his HDD and put into this computer and it booted as well. RAM and HDD work then according to those tests. Asus M2A-VM mobo has onboard video so no video card to trouble shoot. The psu fan is running and the mobo lights up when power is given so I concluded that the psu and mobo are working as well. Can anybody offer any solutions to this? Thank you very much.