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ASUS Sabertooth X58 dead except for green light

Last response: in Motherboards
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September 29, 2013 6:36:06 PM

I have a system that has been trouble free for a couple years, then I walked into the office and it was completely dead, no noise or lights. I poked at the power supply (OCZ 700W modxstream) and decided to try replacing it, so I bought an 800W Thermaltake from Best Buy (only weekend option in town).

With the new power supply, I get one green LED on the motherboard, but nothing else. I've tried pulling the RAM and the graphics card and it didn't make any difference. I haven't tried pulling the processor since it's delicate and such a hassle. Does it sound like the power supply fried the motherboard? I can pull the motherboard out of the case and all that but none of that has changed.

Any other way I can narrow it down? Or some possible miracle solution? I did replace the CMOS batter just in case, but that didn't help.

Thanks - Kevin

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a b ) Power supply
a b V Motherboard
September 29, 2013 7:33:52 PM

Maybe a new CMOS "button" battery, but I think you get warnings when it's low.
If you pull all the RAM & try to post you should get speaker noises, if it can't even get that far, its power issue.
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September 29, 2013 8:03:22 PM

ur6beersaway said:
Maybe a new CMOS "button" battery, but I think you get warnings when it's low.
If you pull all the RAM & try to post you should get speaker noises, if it can't even get that far, its power issue.


I tried doing the power supply test with the green wire, and that did spin the fans and when I have the PS on then the 12v motherboard connector shows 12 volts. The problem seems to be that i can't get the motherboard to send the signal to the power supply to turn on. I've disconnected the case from the motherboard and have tried shorting the power on switch jumper, but nothing seems to happen.
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