I just bought a Dell Optiplex GX400(not from dell). I don't have a switch for it yet so I have to jump start it. When I jump start it the monitor doesn't display anything. The monitor has been tested and it works. I tried another agp video card in it and the monitor still doesn't display anything.
are there any beeps at all? If there are not any beeps sounding, remove the ram and start up again, you should have multiple beeps. I forget how many but it doesnt matter. If you have beeps, the CPU should be ok. Check that first and get back to us.
ok. So most likely everything is working except output to monitor. Now what AGP cards are you trying? I haven't seen a GX400 in a while and the AGP slot SHOULD be keyed for 1.5v only but stranger things have happened. The GX400 only supports4x/2x AGP 1.5v, NOT 3.3v. FYI In case you are having PSU probs you can also unplug EVERYTHING from the power supply except for the motherboard. Possibly the power supply can not give enough power to the AGP slot. ALSO-Clear the CMOS with the Jumper on MoBo or remove the battery on the MoBo with the PSU unplugged.
unfortunately without an independent ram tester its tough. You cant run diags through the PC since you have no video you wont see the result, if it can even run them. Best bet would be to try and find some ram to swap it with, or test the ram in another Motherboard that will support it............5-2-2-1 is a ram issue. It will do that if you only have 1 stick of Rambus installed or a Mis-Matched Pair..