I built this machine about 4 1/2 years ago. Running fine. Then one day, it was sitting at the windows XP log on page and just shut down. (Like there had been a power outage "shut down" NOT "windows is now preparing to shut down") It wasn't doing anything taxing at the time.
I tried restarting it, and could not even get it to turn on at all (i.e. not posting). The only thing I have to go by is there is the LED light on the mobo stating it has standby power, and I can hear almost a fizzle sound that i think is coming from the PSU when I hit the power button. No fans turn.
I took the whole think out of the case to see if it was grounding out. Still nothing.
Here are my specs for what it's worth:
Asus A8N-SLI deluxe mobo
AMD athlon 64 3500+
2 x 512 Kingston ram
Sparkle Power 400W power supply
Do you think my PSU just died? I know it's not the most reputable brand, but if there a good way to diagnose it? Any ideas would be appreciated.
ya, it sounds like it might be a dead psu. If you have access to another pc, try just plugging that into the motherboard and see if it'll power it. If you do not try shorting the psu to see it if turns on. If your unsure about how to do this google it or touch pins 14 and 15 (ussualy these pins will work) with a paper clip and see if the psu fan kicks on. If it does then we'll go from there.
The pin numbers depend on whether you have a 20 or 24 pin power connector. Look at the main power connector. On one side, you should see a green wire with one black wire on one side and two black wires on the other. That green wire is tied to the case power switch. Paperclip the green wire to one of the black (ground) wires.
those were actually pretty decent motherboards back in their day of age. Built a rig for my brother with that thing when amd was giving intel at least a run for its money. Now i strickly stick with intel for just shear preformance increase over amd.
I guess you could recheck all your cable connections. If the computer got moved a lot there is a possiblity of connection creeping going on. Cables slowly got moved and arn't making good connection now. I'd first start with the CPU Cooler fan. make sure that guy is properly seated.
ya my last post deffaintly left a bad taste in my mouth that its not the PSU. I still think that bottom line it has somethign to do with the problem. If you can try to find a computer laying around and plugging it into that. See if that fires it up.
If your sure that the power supply is good then like i noted above try checking cables.
How fast is the PSU fan supposed to spin when just powered on like I just did? The reason I ask is because it's not like it was spinning all that fast, certainly not fast enough to make any audible noise. (It's hard to quantify an rpm...I really have no idea)
I don't have another desktop kicking around to try the power supply. I will try powering up just the motherboard.
Ok with just my motherboard, one stick of ram, the cpu and video card hooked up, all I get is that same little fizzle (it's really quiet and lasts just a split second) and it looks like my case case is about to turn but doesn't. The fan on the psu, or cpu do not begin to spin at all.
Where you plug the 24 pin cable into the motherboard. Check to see that there is no bent pins or anything looks to have broken off.
Next thing i'd try is find where the power switch from the case to the motherboard is. should be a two pin connection. take a paper clip like you did before and touch the two pins. See if this turns the pc on.
I'd say your motherboard has had it at this point. I'm assuming this off the fact we have eliniated its the psu, power switch from the case and assuming you have everything plugged in properly. Maybe check to see if there is any visual burn marks on the board or try smelling and seeing if there is any sort of burnt smells. Your Motherboard should also be on standoffs.
check to make sure your cpu heatsink fan is plugged in and there is also a 4 pin connector that needs to be connected on the mother board (not just the 24 pin one).