[rescue] Dead Power Supply- SS10

[Steve Sandau]

Had this happen with an SS20 and saw someone else recently on the list
with the same trouble. Three suggestions:

1) Pull the power connector off the mb and see if the PS works on its
own.
2) Make sure the memory is seated properly (see last few days' posts!)
3) Replace the power cord and wiggle bothe ends of it (last resort!).

Brian Dunbar wrote:
> 
> I need a bit of advice ... SparcStation 10 and a PC/Terminal Device
> 
> I booted a SparcStation 10 sans monitor and keyboard, but with a network
> patch cable attached to my network.  Attached to the serial port was a PC
> running Linux/Minicom.  The idea being to make a terminal server on the
> cheap, and to use the SS10 as a test machine with the break signal mods, so
> I don't screw up my production systems.
> 
> After fooling around a bit and convincing myself it did work (but before
> doing the break signal mods) I issued the break, brought the SS10 to the
> 'ok' prompt and turned the power off using the switch on the power supply.
> SS10 would not restart - the power supply acted like it was not supplying
> power.  Muttered 'huh' and went to lunch, convinced that a much abused
> system had just crapped out for good.
> 
> Repeated the experiment on my second 'test' SS10 and .. sure as God makes
> little green apples the same thing happened: SS10 would not power on, power
> supply the obvious culprit.  Two failures in a row takes it from 'accident'
> to 'I did something wrong'.
> 
> I haven't (yet) brought in my voltmeter in to check the power leads, but
> there aren't ANY lights flashing on the main board, and no keyboard lights
> flash on power up, which the Book sez means the power supply is wacked.  I'm
> fresh out of Sparcs that I can kill on whim, and I'd hate to fry production
> systems . . .
> 
> What DID I do wrong?  Is the PC/term server doing something via the serial
> port to fry the SS10?
> 
> Brian Dunbar
> Systems Administrator
> Plexus PCB Design Group
> (972) 381-8777 x210
> _______________________________________________
> rescue maillist  -  rescue at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/rescue

-- 
Steve Sandau
ssandau at bath.tmac.com