Weird problem has come up with a computer that was fine.

[RyanGreener]

Hi everyone. Sorry for the vague/weird title. Basically, a Shuttle XPC I built (LGA 775 based) was working completely fine for awhile through the various setups, and now it is having a weird problem. When I press the power button, you can hear the computer turning on but the monitor does not actually turn on and show immediately (the monitor light is orange instead of green). In fact, the only way I've been able to use the computer is by letting it "warm up" for a couple of minutes, shut it down, then re-try again. Sometimes it works on the 3rd try, sometimes it works on the 5th. I have made sure that everything is seated properly, and yes....the monitor is plugged in AND turned on.

The CPU used to be an E8400 but I replaced it with some old ass P4 that I got for 10 bucks off eBay. I don't know if it's a CPU problem, but that COULD be a culprit, although it has been running the old P4 for about a couple of months now so I don't know if that could be it. The GPU was also replaced recently (same as the E8400. about 6 months ago) with an nVidia GeForce 210. It was working fine, and the drivers are up to date, etc. It's running Corsair DDR3 memory that has been working reliably for the whole duration of this computer, which is over a year. The hard drive still works fine obviously....I highly doubt this is a hard drive problem, but who knows? The hard drive is a Raptor 10k RPM that's about as old as the computer (1-2 years). Finally, I have no idea about the motherboard status.

Any ideas on what this could be?

 

[C1]

Some of the P4 capable MBs have power management controls for display in the BIOS. You might want to inspect that area and begin by ensuring that the settings are at least set to default.

You might also want to spray both ends of the display connector cable contacts with DEOXIT, then reconnect as well as even put a slight coat of the DEOXIT on the GPU contacts before reinserting into the AGP slot.

 

[RyanGreener]

Some of the P4 capable MBs have power management controls for display in the BIOS. You might want to inspect that area and begin by ensuring that the settings are at least set to default.

This is an LGA 775 motherboard that accepts the P4, if that means anything. Anyways, I'll try your suggestion....everything is set to default but I'll try to see if any of them are causing problems.

Also, it's a normal PCI-e slot, not an AGP slot. It's pretty much a remotely modern computer, but with an old ass P4 CPU that just happens to fit in the socket.

EDIT: Everything is default....