comp wont boot, LED on mobo is on when turned off, press ON button, exterior lights flash then nothing happens

Question

Specs:
EVGA 680i motherboard T1 version
Intel E6850 3.0Ghz proc, stock fan
2 Gb OCZ PC2 9600 1200 Mhz memory
XFX 8800 Ultra graphics card
Ultra X3 1000w PSU
Seagate 500 Gb sata 3g HD
Sony DVD burner 20x

The Problem:
Just built the computer about 3 days ago, everything booted fine and installed windows without a problem. Shut it down today to move to another room, and set it back up. Attempted to boot, but all that happened was the power light on the tower flash and the fans spin for a second. Took everyting out inspect connections and reinstalled. Boot it up and it worked, watched the system monitor to make sure nothing was overheating and left for a couple minutes. When I came back the computer was off and exhibiting the same behavior as before. After I press the power button and the lights flash all I can see on the motherboard is the blue and orange LED's lit.

Any help would be appreciated.

Thank You

computer wont boot to bios lights flash and the fans spin for a second only then they stop.

computer isnt overclocked, running at stock frequencies

can get computer to boot every once in a while, but after about five minutes it shutsdown abruptly. while it is on i monitor the temps and nothing goes above the manufacturers limits.

Answer 1

It could be heat. Sometimes the processor fan or the power supply fan is failing.

Do you have some form of external fan available, something like a floor fan?

Open the case and run the computer with the external fan blowing into the case.

Try unplugging things that you don't really need to boot.

If you have a CD, DVD, modem, network card or other items , remove them or unplug them. One might be causing the problem.

If your motherboard has its own onboard graphics, remove the Ultra Graphics as part of the test. If you can't remove, try to Safe Boot -- that should use minimum graphics. Safe Boot is F8.

Suppose you get it booted. Go to Control Power > Power Options. Set the hard disks to turn off after 3 minutes.

If the processor runs fine with the hard disk dormant, then the hard disk could be the problem.

OK?

Answer 2

I own a shop and will try to help you. Turn on the ignition switch, test for power at the starter, and at the coil. There should be power at both places. When you jump across the big wire to the little wire you are bypassing the start side of the switch. If it starts there, then when you remove the jumper (screw driver) from it, it stalls. This means you are loosing the 12 volt supply to the run side of the switch. One wire is to activate the solonoid, and the other is to keep it running when the power falls off. Do you have these wires crossed? The one to the inside (closest to the motor) should have power "only" when you turn the key to the start mode. The other should have power on it all the time, when the switch is in the on position. If these are crossed it will act just as yours is doing. If you don't have power to the coil with the switch on, then there is a problem with a fuse somewhere between the switch and the coil, or a bad neutral safety switch, or a bad wire. The + cable comes to the starter, and another wire is hooked in the same place that supplies the ignition switch. Turn on the switch, and it supplies the coil. Turn it to start, and it supplies power to the wire closest to the engine on the solonoid to crank the engine. Find the one that doesn't have power when it should, and trace it back to the switch. You should find the problem by doing this. Glad to help you, good luck!!!

Answer 3

trimagna made some good suggestions.

If you have not done this, with the power off, power cord unplugged, and all the peripherals removed, remove your CPU fan and CPU.

This is the same condition that you get with an overheated CPU.

Make sure you are properly grounded to the computer's metal chassis.

Re-seat the CPU.

Clean off the Heat transfer paste from the CPU and the Heat Sink

Make sure you have heat transfer paste applied to the CPU.

Install the CPU Heat Sink and fan - make sure the Heat Sink is positioned properly on the CPU.

Answer 4

Enter the BIOS and set to fail safe defaults and see if it boots okay then, if so it is being overclocked to a frequency that the CPU, motherboard, or RAM cannot handle.

Answer 5

do you have installed any add on card, if so remove all that even if it is add on graphics card, if there is internal graphics then use it, clear bios, remove your ram and reinstall in another slot, check whether your mb short anywhere in the casing, avoid heat use external fan to blow near your system,
this will do better

Answer 6

May be a faulty power supply.