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wont post all of a sudden
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Posted by: royalcrown
okay, the other night, i was on my computer which i had built 2 years ago and never had a problem with. all of a sudden my sound started sounding all jittery and the mouse was moving with quite a bit of lag. i rebooted and went outside to smoke a cigarette. when i came back my monitor wasn't on. i rebooted again and sat there to watch it this time. again, the monitor wouldn't click on. onboard speaker doesn't beep and all fans/HD's are running. HD lights are on at startup but then go off.
i checked the monitor connections and tried both of my video cards. still nothing.
reset CMOS, still nothing.
swapped out the cpu and ram with my dads cpu and ram, still nothing
i'm thinking the motherboard or power supply is jacked. PLEASE let me know if you guys have any comments, suggestions, or ideas as to what the problem could be.
ECS 648fx-a is the motherboard and keep in mind...this isn't a new setup so its not a hardware conflict...its been running strong for 2 years.
Thanks
Posted by: redwench
something died 
strip the case of all cards and drives, except a known working video card. reboot and observe.
Posted by: royalcrown
well, i think i figured out the root of the problem. took all unnecessary components out and booted up. found out the powersupply was shot. fan wasn't spinning. so here's my next problem....i went and got a new power supply, hooked it up with just motherboard, cpu, ram and videocard. when i hit the power button, all fans and power source led light come on for a split second then turn off. i've reseated everything, checked all connections. bad power supply? i wouldn't think so but maybe. motherboard grounded? possibly. anyone got any ideas?
Posted by: goranpaa
Take out the mobo battery for 30 minutes. Did you maybe move the CMos jumper before, and forgot to set it back?
Posted by: pdnielsen
another possibility (although I hate saying it!) is that you purchased a defective replacement. I hope you kept the receipt. Same thing happened once to me with the almost immediate shutdown and when my brother-in-law the electrical engineer tested it the voltages spiked. If this is happening with your power supply, the system will automatically shut itself down to keep from burning out the processor and/ or mobo.
Posted by: goranpaa
If that's the case. Go for a high quality PSU, like Antec, Enermax. then you can't go wrong.
Posted by: royalcrown
thanks for the advice. when i get home today i'll double check the cmos jumper as well as trying to take the motherboard battery out for 30 min. its possible its a bad psu, i'll just take it back to the store down the street...just bought it yesterday.
Posted by: redwench
its also possible that when the old one died, it took the board with it.
Posted by: royalcrown
ouch...thats just what i wanna hear
Posted by: goranpaa
And if you must go for a new PSU? I would like to add to what I said about Antec and Enermax. get one 500W. Then you will enough power for future upgrades.
And ASUS P4P 800 / SE / de luxe, is a VERY nice mobos for your socket 478 Pentium processor.
I had one of those a couple of years, before i switched to PCI - Express.
Very good and stable board!
And today cheap.
Posted by: royalcrown
anyway to test if the motherboard is toast other than to use a known working psu, ram, and processor?
Posted by: goranpaa
Take out every card except the video card and see what happends. Also look for burnt areas on the mobo or leaking capasitators. There should also be a LED on the mobo, telling if it's got power.
There is'nt really much you can do to troubleshoot a mobo, without testbed and stuff.
Posted by: royalcrown
one thing i was thinking of...even if the motherboard is fried...wouldn't the psu still turn on and stay on? for instance, i think the psu would turn on even if the motherboard wasn't hooked up to it...it should turn on and stay on just by hooking it up to the wall...thats why i'm thinking theres some kind of short...either a defective psu or a short somewhere, like a grounded motherboard.
Posted by: goranpaa
Probably not. I think, that if the motherboard whas serverly damaged, the PSU, would shut off.
But as we don't know what's happend to the motherboard? Try looking for the leaking capasitators and
burnt areas. By the way, what Wattage is the new PSU you got?
Posted by: royalcrown
new psu is 450...and i told the guy i didn't want a cheap one...he said it wasn't cheap. not sure what brand but its not an enermax or antec. i've checked all the capasitators and looked for burnt areas....everything looks good.
Posted by: goranpaa
Does the label on the PSU say what brand it is?
Posted by: royalcrown
i'll have to take a closer look when i get home.
Posted by: goranpaa
But I must say, that Redwench suggestion, seems more and more likely.
This because, even if the PSU is of "less good quality". It should be able too boot up the pc.
If it is'nt a REALLY lousy PSU that is.
Posted by: royalcrown
note this though....when i had the old broken power supply in, and i turned on the computer, the computer came on, all fans spun, (only fan that didn't spin was on the broken psu), all lights were on, computer was up and running, just the monitor wasn't popping on. then i put in this new psu and poop, nothing, just half a second of fans spinning then silence.
Posted by: royalcrown
stumped? lol
Posted by: goranpaa
Check the switch, at the back of the PSU, so it is set to the correct line Voltage?
The old PSU: If the fan on that PSU is gone. Then it is useless anyway. And there could be more inside that is damaged.
Are you sure you did put the ATX cables all the way down in the corresponding mobo connectors? There are 2 of them . One 4 pin and one 20 pin.
Posted by: goranpaa
You can also try pulling the battery on the mobo, for 30 minutes. The battery is round and small. This will reset BIOS.
Yeah, lol! I'm pretty stumped.
Posted by: royalcrown
the switch on the psu is set to 110 which i'm hoping is correct for my area (usa). the 20 and 4 pin connectors are both in all the way. i'll try taking the battery out tonight. but i'm wondering why the computer will turn on with the old broken psu but wont with the new one (even if the new one is broken). man, this is a p.i.t.a
Posted by: goranpaa
Beats me. The only thing comes to mind...maybe. Is that the old one, had enough power still in it, to run everything except the AGP port and the videocard. Or the AGP port also got damaged, when the PSU popped?
Then, when you changed the PSU, Something happend to the BIOS.
That's why I want you to pull the battery.
I know that this is a longshot. But we have to try all possibilitys, don't we?
Posted by: royalcrown
i agree
Posted by: goranpaa
O.K.! Let's see what the pulling of the battery can do? And keep our fingers crossed.
Posted by: royalcrown
i've got a good update for you to play with....i was talking to my friend about it and mentioned that i have an extra 4 pins on teh 20 pin connector, making it 24 obviously. the guy at the store told me to leave 4 hanging off. when i told my friend this it hit him...he had the same problem with his computer a while back when he had the 24 pin connector but can't remember what he did to fix it...ring any bells to anyone???
Posted by: goranpaa
Yeah! The 24 pin is for AMD processors. You need a 24 to 20 pin adapter.
If you can't find it where you live?
http://www.xpcgear.com/24to20pinatx.html
Costs 10 bucks.
Posted by: goranpaa
Are you sure, you did'nt get one with the new PSU?
Posted by: royalcrown
positive
Posted by: goranpaa
Pity. But get one . As rewireing is a rather risky thing to do.
Posted by: royalcrown
that same friend said that it works for him. if you just leave the 4 on the end hanging off it should be fine. i've also heard of people with a 24 pin motherboard with a 20 pin supply working together. i think its something else. i think they just have those adapters incase there isn't enough room on teh side of the motherboard plug (capacitators in the way)
Posted by: royalcrown
but we're getting close. he experienced the same problem with the 24/20 pin setup. he just cant remember how he solved it.
Posted by: goranpaa
I think, he must have rewired it .
Because if you look at a 20 pin and compaire it to a 24. ( see pictures. Unfortunatly in German)
You see the difference.
Posted by: royalcrown
hmm...interesting, checking into it
Posted by: royalcrown
it looks to me like it works, the numbers are different, but thats just the numbered pins...its the color and description that we're looking at that matters. and if you match them starting at the top, they're the same.
Posted by: goranpaa
So what you have to do, is to connect the nr. 23 to 19 or 20? on the 20 pin. And 12 to 1 or 2. And 11 to 10.
Not sure if I got it right?
Posted by: royalcrown
that does make sense, and here's why. i work in IT and after work today i talked to another guy and he mentioned that the power supply is doing what it might do if it was plugged into the wall, but not the mother board, (turn on briefly and then realize there's no load and shut itself off). in this case, since all pins aren't plugged in...the psu is thinking that its not plugged in and shutting itself off...agree?
Posted by: royalcrown
now how in the heck do i pull those wires out and stuff them in a tiny hole with another?
Posted by: goranpaa
Come to think about it. As they are the same on the 24 pin?
Maybe it is just sufficient to cut them off, and leave them there.
But you ARE taking a big risk!
Maybe you still, should get that converter?
Yeah, that sound resonable.
Posted by: goranpaa
It must be some way to pry the ATX contact open?
EDIT: Forget what I said before! To cut them, would just lead to the same result.
Posted by: goranpaa
Or if it is possible to just push out the pins?
Posted by: royalcrown
well i dont know how, but i got it working. just fiddled around with it, didn't make any major changes except i did leave the board battery out for a bit, maybe that did it. so it works now! thanks a lot for your help. this was my first time on this board and am very impressed. by the way. the extra 4 pins are just hanging off the edge...so i guess we both learned something that we can pass on to others who might be wondering about this in the future. once again, thanks for your help
Posted by: goranpaa
Great!
Nice you got it going again.
And as you said, I also learned something along the way.
You're welcome!
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