Re: Dead IIgs- possible causes?

[Rubywand <rubywand@swbell.net>]

Michael Elliott writes ...
> 
> I have a dead Rom 01 IIgs ....
> 
> Here's what happened- after successfully reloading the Focus Hard Card
> on this machine, it restarted and operated exactly once.
> Then, after being turned off for 15 minutes, I now get nothing- no beep-
> no light, nothing.
> Is this obviously a bad power supply? or is there something on the
> motherboard that would possibly cause this kind of catastophic failure?
> I get no LED's, and no power to the interal fan plugged into the
> motherboard. Unfortunately, I don't have a meter ....
>

     It does sound like, one way or another, power is not getting to the 
motherboard.

     With the machine OFF, remove the Focus Card and try unplugging and 
re-plugging the AC power chord and the power supply plug to the 
motherboard. Also, try unplugging the +12V internal fan and any joystick-- 
if either has become shorted, it may be causing the power supply to shut 
down. (The reason for unplugging the Focus Card is to avoid kicking it 
ON/OFF/... should the problem be a poor connection which causes 
intermittant power to reach Slot cards when the machine is tapped or 
jiggled.)

     Other things to check include a bad AC power chord and broken/loose 
power supply socket connections to the motherboard.

     If the motherboard was recently removed/replaced, another possible 
problem is shorting to a bent part of the metal shielding on the back or 
bottom of the case.

     Unless you have some Slot card which is loose, incorrectly plugged in, 
or otherwise producing a short, the remaining 'usual suspect' is a power 
supply with a blown component.  

     
 
Rubywand