Path: utzoo!mnetor!uunet!oddjob!hao!boulder!sunybcs!rutgers!mtune!mtgzz!drutx!druhi!mab
From: mab@druhi.ATT.COM (A.Bland)
Newsgroups: comp.sys.cbm
Subject: Dead C128 in need of resurrection
Message-ID: <2706@druhi.ATT.COM>
Date: 22 Feb 88 23:52:09 GMT
Distribution: comp
Organization: AT&T, Denver, CO
Lines: 29
Keywords: defunct, deceased, departed, late

A little bit of user port hacking over the weekend has left my C128 dead.
I know, never give a soldering iron to a software jock, but...

I seem to have accidently shorted user port pins 10 and 11 (both are
labeled 9VAC).  Pins C-L (data) and N (GND) were also connected at the
time, but I don't suspect that they caused any problems.  The C128 booted
OK at first, but when I tried to type on the keyboard, nothing happened.
The 80-column cursor was still flashing, however, so I thought the machine
was still somewhat healthy.

After powering down and removing my junk from the user port, I can no
longer get the C128 to power up.  The power LED lights up, but nothing
else happens (40 and 80 column screens stay blank, disk drive doesn't
boot).

I tried swapping the two CIA chips, suspecting that I had fried one of
them, but that didn't change anything.  I can't find a fuse anywhere, so
I guess it's not a blown fuse.  My next guess is that I may have done
something nasty to the power supply, but I don't know how to verify that.

Any suggestions before I make a trip to a repair center would be greatly
appreciated.  I'm anxious to get the machine working again so I can get
back to my user port hacking :-)

Thanks!
-- 
Alan Bland
AT&T Denver
ihnp4!druhi!mab