Bizarre. So the problem follows the bad board? I may try swapping out
the parts on the board anyway. looks like some tantalum caps, diodes,
and a resistor or two...
Any pointers to what the values should be there? The service manual
doesn't go into any of that detail...
Thanks.
-Pete
On Aug 4, 2009, at 1:18 PM, Mark Sims wrote:
I have one of these with the same symptom. The problem is with that
little interface board with the PS/2 connectors. I can swap it with
one from another system and it works fine.
The real problem is that board is just connectors and some EMI
filter R's and C's. I replaced the PS/2 connectors and it does the
same thing. I have checked all the other parts on the board and
buzzed out all the connections (including to the end of the
interface cable). Everything checks out just fine... everything
compares identical to the known good board... still no worky...
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