On 19 Feb 2005 10:15:37 -0500,
lid (Bill) wrote:

Ok folks...........this may be of some help. I think I fixed my
monitor turning off problem.
There was a dry joint (unsoldered joint) on U13 on the graphics card.

May be an idea to whip out the graphics card and do a full inspection
of all the joints.

Cheers

You're fortunate, most would not have caught that problem.
What make/model of card is it and what part is U13?