ASUS A8N-SLI Deluxe power-up problem

[TehDMV]

I have an ASUS A8N-SLI Deluxe motherboard. Yesterday, everything was working fine. I moved my computer to another room, and one of the PCI cards' screws slipped out of place. I opened my case and put the screw back in place. After I got everything hooked up, the computer would no longer turn on. At first I thought I must have had disconnected something when I opened my case, but I took time out and ensured everything was connected properly. I noticed that when I plugged the computer in, the green light on the ASUS motherboard would still come on like it always did. Whenever I press the power button, the computer no longer turns on, although the power switch jumpers are in the proper place, and everything seems to be hooked up correctly. The motherboard also has a feature where it tells you vocally if something is wrong with the hardware, but nothing happens. It just stopped turning on, and I have no idea what could be causing this.
Computer specs:
1 GB Corsair RAM
550W PSU
BFG Tech 6800+ graphics card
AMD A64 3700+ 939
A8N-SLI Deluxe mobo

Help would be greatly appreciated.

[claybv]

most of time we have been running into mobo's that have bad caps. when it is running and you shut down wont come on again "OR" will not come on till cool down make sure capacitors the are canister shaped or barrel shaped dont have a bulged head. Should be flat like some others on there that you can compare to. Common problem we have with all makes of 'MoBo's' and 'LCD monitors' we see daily.

Hope this helps!

[KarmaKiller]

It could be a cap., but I doubt it.
More then likely the Graphics card isn't all the way inserted, or the PSU might have gone out. If it's a generic PSU, then that's a very good possibility.
I'd check those first, go from there. A new PSU is cheaper then a new Mobo in most cases.

[GateCrash]

I'm having the exact same problem (although without having moved the computer). One day it powers on normally, the next, nothing.

I've tested the PSU and it seems to be working normally. Unplugging every component and re-plugging one at a time gives a positive test result every time. Then I plug the PSU back into the motherboard, the green light comes on, I press the power button, and nothing happens.

TehDMV, did you resolve the issue? Anyone else have another idea?

[electric]

check to make sure the power cord is plugged all the way into
the power supply

looks can be deceiving

[GateCrash]

Thanks for replying. I wish it were that simple; I've unplugged and replugged the power cord at least two dozen times over the course of testing.

Like TehDMV, the LED on the motherboard lights up, but nothing happens when I press the power button. I've followed the directions on the PSU manufacturer's website for manually shorting the power supply to test it, and it seems to be fine, even with every component except for the motherboard plugged in. Once I plug it into the mobo and hit the power button again, though, nada.

I thought the power switch might be at fault, so I tried swapping the power and reset switches, but still no luck.

At this point my guess is that my options are:

1) Some problem with the power supply that escapes their diagnosis; or

2) Some problem with the motherboard.

Does that sound about right?

[Atomic Rooster]

Jump starting the power really doesn't help in these situations. It may start up, but there may be a bad circuit that is keeping the unit from supplying enough power to run the system. It's best to swap in a known working power supply to test.

[MrPutin]

I just received replacement motherboard from Asus repair department, the old had couple other issues. And as with the old one I have this intermediate power up problem. Since my current motherboard was recently tested at Asus, I assume it to be functional. Probably my power supply, power button and this particular motherboard have some weired incompatibility. At this time I do not have another PS and a case to test it.

This problem comes up when I plug-in or unplug any component , or sometimes even when just open the case. The green power LED on the motherboard is On, but pressing the power button has no effect. Sometimes when I disconnect and reconnect any component on the motherboard it powers up, sometimes not. Also yesterday I noticed if I leave the motherboard with the power running to it for about 10 minutes, and then press power button the computer powers up. I tried this method only twice, so I don't know if it will always work.

I had these issues since day 1 three years ago when I bought the motherboard and my current computer case. But it wasn't a big problem, since it used to be if I manage to start up the computer once, and do not mess with it, the computer would always power-up later on, until the next time I decide to change something. Will see how that will go tonight, when i put it all together. Last time the motherboard did not want to see my video card, only after 2 hours of messing with it the machine booted up. I guess there was a bad contact with the EZ-selector card.

[GateCrash]

After swapping in a different power supply at work--and one rated for only half the watts, at that--my PC booted right up. Looks like I get to learn about PC Power & Cooling's generous warranty policy firsthand.

Thanks for the help, AtomicRooster and electric!