Re: Mobo repair - any point?

w_tom wrote:

On Sep 2, 7:05 pm, Sam Goldwasser <s...@xxxxxxxxxxxxxxxxxxxx> wrote:
Need more info. On some like Compaq, a corrupted CMOS may result
in a totally dead PC.

I believe Sam meant corrupted BIOS - not CMOS. A corrupted BIOS
sometimes can still be restored - but only a few manufacturers
installed that option.

Just because power supply fans spins or LED illuminates does not
mean the power supply 'system' is working. Yes that subsystem that
can only be confirmed with a meter. Same applies to the battery.
Meter can measure that battery without removing a battery. Therefore
battery is only replaced when defective - no throwing money at
problems on speculation.

I have repaired motherboards. But it requires extensive electronics
knowledge. OP's original question implies woefully insufficient
technical knowledge. We repair things to learn. Using the meter will
provide more information - better replies here.. And if posting
numbers from that meter, then others can provide more meaningful
answers; reply with educational insights.


No, some motherboards would not boot with corrupt data stored in the
CMOS battery backed RAM in the RTC chip. Just swapping the battery
didn't fix it, the battery had to be removed and the holder shorted out
to completely discharge the FETS in the CMOS RAM.

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
.

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