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power supply went BANG!

By jmarchetto ·
The computer was recently on for a good period of time (a few hours) and then properly shut down. About 10+ minutes after the computer had been off, I noticed the 2 LEDs on the front blink on and off twice (this may have happened more prior to me walking by and noticing). Next thing.. a BANG! came from the computer and a billow of smoke came out the back. I immediately pulled the plug. I first check for fire and once I determined the system was safe to pull out from the hutch, I opened it and looked for a cause. There were no scorch marks on the MB or connectors. I located the burny smell to be coming from inside the power supply. I pulled the power supply (again no burn marks on the mb where the connectors hook up). Now, my question is: Do you think that BANG (which someone said may have been the transformer in the power supply) fried the system? So far I have only attempted to test the hard drive in another system, with no luck. The hard drive not only does NOT show up in BIOS, but also causes the CD burner on the same controller not to show up (HD master & burner slave). I am very familiar with jumper settings and was able to have another hard drive show up. The hard drive in question is a 17.2 Gig Seagate (whichI read on this site may have compatibility issues). Any help would be greatly appreciated! The computer is my fiance's and she is hoping this isn't going to turn out to be her hard lesson in the importance of backing up files (like half a semesterof seminary!)

Other info: the computer is an Athlon 750 with a 300w power supply. The computer is only 18 months old and is not used that hard.

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power supply went BANG!

by TheChas In reply to power supply went BANG!

Depending on how the power supply failed, it is very possible that everything in the PC is fried.

If the 5 or 12 volt line went high, it could have damaged just about anything. There do not need to be scorch or burn marks for there to be damage.

Look closely at the components near where the power supply plugs in. You are looking for cracks or bulges on the parts. If you see any bulged or cracked parts, it confirms that the power supply over voltaged the 5 or 12 volt line.

At this point, the whole PC is scrap. I would not attempt to reuse any part of it.

If you are good at soldering, or have a friend who is, you may be able to recover the data on your hard drive.
What you need to do, is get a hold of an "identical" drive, and swap the controller board onto your drive. If the motors are not damaged, this should work.

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power supply went BANG!

by jmarchetto In reply to power supply went BANG!

Thanks for the tips as to visual signs. The HDD trick is a bit above my ability (not to mention the lost data is only time, not a company or lots of money).

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power supply went BANG!

by jereg In reply to power supply went BANG!

I might be tempted to get another power supply(by the way, transformers don't **** up, but the caps might). You can find a cheap PS, and it might be worth the effort. Any or all the components may be shot, or may be fine. I think I would test them one at a time. First, just PS and motherboard. See if you get any post beeps. Turn it off, then put in the video card. Repeat with each component, leaving the HD for last. If the hard drive won't boot, do as the first answer says, and replace the HD controller card with another.
Good luck.

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power supply went BANG!

by jmarchetto In reply to power supply went BANG!

Thanks fo the trouble shooting tips. IT seems like at least the Athelon chip is fried and the HDD. Not sure yet what else got hit. I need to get a spare Athelon chip to test the board.

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power supply went BANG!

by jmarchetto In reply to power supply went BANG!

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