Monitor goes to sleep when pc is turned on .

I am working on my neighbor's slimline HP right now. His HP was having the same problem and has an extended warranty thru HP. He sent the computer to them and was told the motherboard is bad and not repairable. They actually told him to go buy a new computer! I told him I would take a look at it for him. I could not verify if it was the on-board video because even though the board has a PCI-E slot only a half size graphics card will fit and I do not have one. I need to verify that it is not the power supply but the problem is the board uses a small form ATX connector so I had to order and adapter for $15 and I am waiting for the part. If the power supply turns out to be then I will probably install a new motherboard. The problem is there is no where to get a new motherboard for this model(was made by Asus for HP). There are only used available one's available with no warranty. When I get the part to test the power supply I will post an update to you.

Check frequency using Monitor buttons and try to reduce it.

Hi,

Please type the problem in brief.It'll help me to analyse the problem in a better way.

Awaiting response.