Hello-
I've repaired a number of battery-damaged P6 boards, and I would first
question your statement that "all traces & contacts are verified".
It only requires one data or address trace to be incomplete or shorted to
another trace, and/or only one connector trace to be broken or shorted to
cause the kind of problem you describe.
Do you have a scope? It's helpful to view all the lines (clock, data,
address, etc) from the CPU - -
But the standard method is to use a continuity tester to verify every
single trace (using the schematic for comparison), beginning with the lines
from CPU to ICs 31 & 30, then to 26 & 24 to the RAM chip (and don't forget
23 & 25), looking for continuity & shorts.
Another thing to look for, when ICs have been replaced, is broken or
shorted traces underneath the new sockets.
It's a long & painstaking process; but it always pans out, in the
end; I've always been able to eventually get the board back to full
working condition, and I've never seen a dead CPU (so far) (fingers crossed).
~GMM
At 05:11 PM 4/27/04 +0000, you wrote:
>Hello All!!!
>
>I recently purchased a P6 and mine was close to dead, wierd sounds
>and blinky lights, well I decided to head out to the electronic shop
>and try the battery replacement project, since my battery had leaked
>and affected several IC's so I took those out, and the battery also,
>did a pretty good job of cleaning it out and resoldering it back. I
>happen to find at the electronics store a barrel drum type battery of
>the same voltage, so I decided not to go with the lithium upgrade,
>and I replaced the battery and bought 2 IC holders, WHALLA, I was
>done none of the traces were bad and all traces and contacts were
>verified. according to old crows website if after this procedure the
>CPU may be bad. well it looks that way .......... I get the same
>wierd distorted sounds as before. can anyone help?
>
>
>
>
>
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