On Mon, 25 Nov 2013, Peter Coghlan wrote:
It seems the 12V rail disappeared now...I'll confirm tomorrow. No serial
and no AUI. System is...difficult to get to a console prompt now unless
it is moved or smacked.
Is the 12V rail present at the power supply connector? If not and the other
rails are working, it is likely that only a very small number of components
and could be responsible. If the problem is intermittent, it is likely to be
due to a bad solder joint between one of these components and the power supply
PCB or a bad contact in a connector.
I checked later...it turns out I missed an obvious step: make sure the
power connector didn't come unplugged.
All is good now.
Be very careful to avoid touching or short circuiting anything on the live
side of the chopper transformer and the mains input side of the power supply
in general if you have to run it with the cover off.
Yeah. I know to do that for sure.
Regards,
Peter Coghlan.
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects