Re: PC will not power up

On Tue, 13 Sep 2005 19:43:23 -0400, "Frank" <ffarero@xxxxxxxxxx>
wrote:

>A client brought his pc in for routine cleaning. When I plugged it in and
>pressed the power button nothing happened. I checked the following:
>checked the outlet / replaced the cord / swapped power supplies / removed
>all cards / reseated the power supply plugs on the MB / removed the MB and
>attempted a power up / jumpered the power switch pins on the MB.
>
>Here is the kicker: I reinstalled the MB let it set for about an hour then
>it booted up. When I shut it down the same no power issue came back. Any
>ideas?
>
>
>
Sounds like a MOBO failure to me, dry joint, cracked tracks something
similar. Can you try the MOBO in a known working PC just to boot up
and rule out the rest of the components? It does not have to run just
prove it will power up or not.

Taking it out and putting it back in probably jiggled it back into
action temporarily but on shutdown something as minor as the fans
stopping can cause enough shock to screw it up again. One thing you
could try is an aerosol freezer, sprays liquid nitrogen onto a circuit
board and temoporarily fixes dry joints and cracks, crude but it can
prove a faulty area of a board, but even if you get lucky and find a
fault the odds on you being able to fix it without causing even more
damage are very slight.

Jonah
.