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SMP Box Down - Diagnosis Help

K

KMac

[H]ard|DCer of the Month - June 2012
Joined
Dec 30, 2002
Messages
549
I had a -bigadv SMP box go down with a horrible acrid smell. I immediately suspected the OCZ StealthXStream OCZ700SXS PSU, but sniffing the PSU itself was not nearly as bad as the rest of the house. There was dust on the (non-folding) ATI video card and the PSU intake, but none on the case fans, chipset or CPU heatsink fans. The MB is a refurb EVGA X58 3 Way SLI E758-A1
The PSU will light the MB LEDs and try to spin the fans, but they only get a revolution or two before they stop again.
Installed and powered up, both the 5V and 12V read next to nothing on a multimeter, but when disconnected from the MB and shorted to power-on, both the 5V and 12V read in spec.
Disconnecting the power from (but not uninstalling) the GPU changes nothing.
Any ideas? I do have a spare PSU and that will be my first thing to try tomorrow, but the no-load, in-spec PSU readings have me second guessing my diagnosis. :confused:
 
It sounds like a capacitor might have blow on the motherboard. I would search there and look for something like this.

Take a flashlight and comb through the MB carefully and see if you see that anywhere by the capacitors. Depending on the damage and your experience with soldering it could be a cheap fix and relatively easy fix if the acid hasn't leaked all over your components.
 
It does sound like the mobo, but the psu might still be the issue as it might put up volts but can't under any kind of load.

Flashlight is prolly the best idea. With that kind of smell, you should see something physical.
 
Thanks guys, it was the PSU. OCZ burned me again.
I hereby vow to never again use any component bearing the OCZ brand name.
 
You'll prolly want to stay away from new PC P&C too since OCZ now owns them.
 
Ya they bought them out in 2007. They haven't gone downhill as far as OCZ has but they aren't what they used to be.

Paul summed it up well in his review of the mkII 950.

"Don't take this review to mean that the Silencer MkII 950W is a "bad" PSU. Users who have bought it should not run out to get something new. The MkII 950W just represents a solid step or two backwards from previous PC Power & Cooling products in our view."

http://www.hardocp.com/article/2010/08/10/pc_power_cooling_silencer_mkii_950w_psu_review/1
 
oh, i was going to vote for the mobo

had a similar thing happen to me.
 
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