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Water Damage!

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Hello all. While at a friends house tonight, his brother approached me with an issue. While he was out of the house it had rained. This rain, leaked into his window and on to the top of his tower. His tower has a top mounted fan and some of the rain water managed to get in there. He says the system was in sleep mode at the time. He said he took the fan out and removed all water and then placed a heater in front of the system to attempt to dry it out. Never tried to turn it on.

Some hours later, he plugged in the power cord and when doing so got a light shock in return. When trying to turn the computer on, nothing. The PSU is top mounted and got a little wet so my first assumption is that it may have been bad. I tried his brothers PSU and the green light on the motherboard was lit. I then tried the same test with his PSU and surprisingly got the same result, the green light on the mobo was lit.

So, it seems to me that the PSU is at least working enough to send power to the mobo and the mobo is at least working enough to get this power and illuminate the little green light. So, what else could it be? I realize that it could be a multitude of things but I am really trying to pinpoint the issue, if possible.

I don't really have exact hardware specs at this time. :/

Full tower case
550W PSU
Asus mobo
dedicated video card
 
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Oh gawd... the PSU is connected to EVERYthing in the computer.

I really don't think this is possible to fix without a spare part for every piece of the PC to try swapping one at a time.

Water damage sucks.
 
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Oh gawd... the PSU is connected to EVERYthing in the computer.

I really don't think this is possible to fix without a spare part for every piece of the PC to try swapping one at a time.

Water damage sucks.

Pretty much.
 
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bootproblemflowchart.png
 
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I kind of figured it may come down to testing everything individually, but was hoping not lol.
 

the54thvoid

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I had a water disaster last year. Forgot to plug an outlet on a gfx card during a leak test. Put about 2-3mm depth of water on most of mobo.

Took the system apart (I use a test bench) placed naked mobo on radiator, took PSU cover off to air the internals and used a hair dryer to do as much as I could. Left it all drying like that for 4-5 hours. Reassembled after using tissue paper to test for moisture. All was well.
I don't think your friend let it dry for long enough.... Water in a system will hang around unless you get in at all the joins and crevices.
 
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90% alcohol solution, submerge if possible if you can't wipe down the components with it. Resurrected a friend's MacBook Pro with this after an orderly spilled a pitcher of water on it in a rehab place. I cleaned off the visible corrosion with alcohol first. System booted but wasn't stable. It would maybe boot once then fail to boot for awhile. Disconnecting power and leaving it a bit + reconnecting would work but then it wouldn't boot again after that one time. So, got drastic, went out and bought a bottle of 90%. Dunked the board in 90% solution. Let it dry for awhile. Hooked it up, worked fine. No problems at all. Like a new machine. Saved her $700 that Apple wanted to charge to replace the board.
 
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I have spilled a glass of lemonade on my netbook years ago, it was on at the time,
it went off and I placed it on a radiator for a day, the next day it was working again!
Unfortunately the keys stayed sticky underneath it, I tried to remove a key but I could not get it back on so I left it as it was.
 
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Should have waited a couple days with a fan blowing on it, not hours before trying anything. :( Sadly, unless unplugged or the master power switch on the back of the PSU (if it has one) the computer is in standby mode with +5V flowing through several circuits on the motherboard. If water got in there, the damage may have occurred when the first few drops got in.

Assuming the computer is thoroughly dry now, and you have tried two different power supplies, then I am afraid the motherboard is likely bad now too.
 

de.das.dude

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I wouldnt have high hopes for this one. Specially since the thing was powered at the time.
Just using the heater from the front isnt really going to do anything to the water that has seeped under the SMD chips and there are thousands of those.

a better way is to dunk each item into a bucket of rice (or dehydrant like silica stuff) and put it in the sun for a few days and hope for the best.
 
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I will relay all of this info to him. Thanks guys! So, final verdict is more than likely the motherboard is shot? Is it a safe bet to say that the PSU is ok though?
 

de.das.dude

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well the PSU's do come with some sort of short circuit protection depending on the model, but i really wouldnt have my hopes up.
 

Mussels

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best bet is to totally disassemble the system out of the case, and try the very basics - mobo, CPU, one stick of RAM, PSU, onboard video if possible

its possible there is still moisture in there, and the taking the system apart will allow it to dry out faster.
 
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Looks like that's what I may be doing!
 
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