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Thread ID: 54910 2005-02-25 19:12:00 Fried Motherboard, but why? buck25 (7432) Press F1
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328198 2005-02-25 19:12:00 I decided to make a computer for the first time, and ran in to some major trouble. I bought a soyo 939 board, AMD 3000+ chip, and 512 ram. I found it hard to get the motherboard to fit normally in the case (basically, I didn't realize that I was supposed to use the plastic screws that raise the motherboard off the back of the case a bit. Instead, I just screwed it into the case thinking that it didn't matter. Too make a long story shorter, When I plugged the 550 watt power supply in and turned on the computer, I heard a spark and smelled something burning. I quickley turned it off, but it was too late. My motherboard was fried and Sparks had spewed out of the powersupply, which is also fried. My best guess is that the soldered parts on the back of the mobo were touching the metal back of the case and shorted out the motherboard which in turn fried the powersupply. Is this a correct assumption? Anyway, I wasn't sure if maybe it was just the powersupply which was already bad and it fried the motherboard. Either way, I know the motherboard is fried, but I'm not sure if it was because of the way I put it in the case or because the powersupply was fried in the first place. Any input would be great. Thanks. buck25 (7432)
328199 2005-02-25 19:20:00 Yup, I would say because u didnt put the plastic spacers in, between the mobo and the case. When u installed the mothercase, into the case.

It would have shorted on the back of the case.

I dont think the power supply was the prob. I would say if the ps was fried, then it wouldnt have gone in the first place (if u saw the fan spinning), when u turned the power on.
Speedy Gonzales (78)
328200 2005-02-25 19:31:00 Yea, you are probably right. Damn, I didn't see that one coming. Do you think that would have ruined my processor? I know the ram didn't get fried because I checked it on another computer, but I don't have another 939 mobo around to check this processor out. I susspect that it is fine, but maybe the damage isn't something that I would be able to see. Any thoughts?

thanks

Also, what would happen if you connected a fan to the motherboard and also connected one of the power connectors as well. The fans have led lights, and came with no directions. I thought you had to connect one of the motherboard connectrs to run the fan and a power connector to one of the powersupply connector to run the light on the fan. I thought maybe that was the culprit in the first place after I realized that I was supposed to pick one of the 2 choices. Anyway, The fans work and I susspect the motherboard was so shorted out that there wasn't enough time to even start the fans seeing that none of them turned on in the first place.
buck25 (7432)
328201 2005-02-25 19:36:00 Moved thread to appropriate PressF1 forum for topic, instead of Chat forum. Jen (38)
328202 2005-02-25 19:48:00 It may have fried the CPU. Not too sure. You dont have to connect a fan to the mobo and a power connector. One or the other should work.

The fan connection on the mobo, just lets u monitor the speed of the fan with programs. Connecting a fan to a power connection will still work, BUT u cant use programs to monitor its speed etc. If the fans are still going , its because theyre connected directly to the power supply... if they still spin while connected to a power connector, it sounds like the power supply is still alright.

Unplug them (the fans) from the power connector/s on the power supply.

Leave the fan connections on the mobo. See if they still go. If the mobo is dead, I dont think they will spin.
Speedy Gonzales (78)
328203 2005-02-25 20:04:00 While I feel deeply sorry for you, I am smileing too. Now I am not the only one in the forum to have stuffed up a new motherboard. I ruined three M/Bs and two CPU before I got it right.
Better luck next time.
Jack
JJJJJ (528)
328204 2005-02-25 21:56:00 Dam..what a waste of a truely great mainboard,I love Solteks and have been after a secondhand one of those for a while. cjongreen (7128)
328205 2005-02-25 22:01:00 Oops wrong board..no loss then. cjongreen (7128)
328206 2005-02-26 02:04:00 Your CPU is "probably" still OK . ;)

You might even be luckier than you deserve . :p

The supply should shut itself down rather than cooking up when it's shorted, and the "burning" smells may have been from wires getting a bit hot, though you may have cooked a few resistors . (But even they may have survived, despite their sad appearance . )

Try first without the CPU plugged in . Just have a fan plugged into the motherboard, and see if any LED flicker and if the fans start .

In future, remember that metals conduct electricity . The expensive bits don't like being shorted out . Insulated spacers are provided for a reason .
Graham L (2)
328207 2005-02-26 03:34:00 Is it insured? Well, more was it over the minimum cost to be covered?

You need to use those spacers, it will have shorted to the case in numerous places. It may still be alive or salvagable, but don't count on it.

If it's insured, go for that - otherwise try it sitting outside the case on an antistatc bag, with the speaker plugged in and no CPU. See what happens. Try various things to see what level of life it still has. If you can get it to beep, that's better than silence. If it smokes when you turn it on, it's gone :( throw it out and get a new one.

Examine also the keyboard lights - do they flash when you power up?

The PSU will be just fine.
george12 (7)
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