Pro-380 keyboard not working

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2 total messages Started by William Petrisko Sun, 27 Sep 1992 12:25

#797

Author: William Petrisko
Date: Sun, 27 Sep 1992 12:25

17 lines
1201 bytes

I have a Pro-380, the only problem (so far) is that the keyboard interface
appears not to be working at all.

By this, I mean that any keyboard plugged in appears completely dead--no 
lights or response whatsoever.

Question:  Is this a common problem?  Are there any components that are
likely suspects?  What board is the keyboard interface on, and is that
easily replaced?  I guess the question is, am i stuck with a easily
fixed doorstop or a useless doorstop?  ;)

Any help appreciated...

-bill
--
bill petrisko                                  petrisko@evax2.engr.arizona.edu
   aka n7lwo                 ...!uunet!4gen!warlok!gargle!omnisec!thumper!bill

Re: Pro-380 keyboard not working

#798

Author: Barry Kort
Date: Sun, 27 Sep 1992 15:45

20 lines
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Take out the Mother Board and inspect the area near the Video Connector.
Look for a meltdown on one of the leads and bridge it with a dollop
of solder or a jumper wire.

To remove the Mother Board, pop the latch at the front of the HD and
floppy drives and slide them forward.  Uplug the ribbon cables to the
card cage, and unscrew the 3 thumbscrews on the front of the card
cage.  Unplug the power cable and slide the Mother Board out.

The meltdown can occur if you try to connect the Video Connector with
the power on.  If you misalign the connector, you can short the power
lead and meltdown the lead (I think it's Pin 1 or 2) to the keyboard.

Write me at barry@michael.ai.mit.edu if you need further advice.

Barry Kort
Visiting Scientist
Educational Technology Research
BBN Labs
Cambridge, MA

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