Re: atx mobo not powering

check the caps that are around any hot
spots on the mobo like around the reguators
and cpu, i did a p2 the other day, it was
caps near the mobo regs.

"yhan" <cheian07@xxxxxxxxx> wrote in message
news:1126676986.632953.61650@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Remove the mainboard from the case, carefully examine all electrolytic
> capacitors for bulging tops or leaking electrolyte. NEVER enable PSU by
>
> jumping the green to ground while it's connected to the mainboard. If
> the
> mainboard doesn't want to start, it has a good reason. Try the
> mainboard on
> the desk with only the Monitor, PSU and Keyboard connected. If you
> still
> have no luck, and even if you see no problem with the caps, I would
> still
> suspect them anyway. From what you say the CPU and memory are OK, The
> PSU is
> OK that only leaves the Mainboard.
>
>
> - thanks for the input. i inspected capacitor, nothing bulging out. i
> dont have an esr meter, only ohmeter but it would be difficult to test
> capacitor in- circuit... and i think desoldering a suspected caps in
> the mainboard would be a difficult tastk.
>
> new progress..
>
> remove the mainboard from the case. connected the memory and cpu, then
> connect to the monitor. turned on, yes it powered up but after the
> monitor got a display for a few seconds only, maybe 2 sec, it shuts
> down. repeat the test and achieve same result. what causes the computer
> to shutdown?bad/shorted motherboard?
>
> thanks,
>
> ian
>


.

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