|This sounds rather similar to my computer's problem.|
First, Derek, it sounds like the "error message" is just
the monitor saying that it isn't getting a signal.
Just a couple of days after I first applied power to the computer
I assembled five years ago, I found that sometimes no signal was
reaching the monitor just after turning it on. That problem has
persisted over the years. Also, when I completely shut off power
to the motherboard, then applied it again, the two lights on the
motherboard would flash, obviously indicating some kind of
serious problem, and the computer would not start. This problem
went away, but maybe only because I hardly ever completely shut
off power to the motherboard.
I don't know whether the two problems are separate, or one and
the same. I don't know whether the problem is in the motherboard
or the power supply. Both problems seem to appear when the
computer is cool, and go away when it warms up.
The lack of signal occurred with both HDMI and VGA cables. I've
been using HDMI and only tested the VGA briefly to confirm that it
didn't fix the problem. Recently I attached a DVI cable for the first
time, and for a few days I thought the problem was gone. But then
it happened again.
When I first turn the computer on, the signal may or may not reach
the monitor. Usually it does, but just a few seconds later, still near
the beginning of the POST, it often goes out. During POST there is
a video reset, and very often the video comes back on a that point.
Sometimes it goes out again. Sometimes it comes on and goes
out numerous times during the first two or three minutes after turning
the computer on. Eventually it always comes on and stays on. But
sometimes I have to give it a little kick by pressing Ctrl-Alt-Del, which
does a video reset in Windows. In the past the problem has occurred
after waking the computer from sleep, but I haven't seen that recently.
I am going to replace the power supply and see if that fixes it. I have
a new one and just need to install it.
-- Jeff, in Minneapolis
message edited by Jeff Root