Thank you, I will try.
Jerome
Le 12 nov. 05, à 00:33, James MacPhail a écrit :
This was an aside to another problem, so it looks like it didn't get
any
attention:
when I switch the Lisa off, it goes off then on immediately.
I have seen a couple of causes for this problem, ones that come to
mind are:
1) Damaged (broken) traces on the I/O Board due to corrosion from
leaking
batteries.
If your I/O Board once had batteries on it, check the continuity of the
traces in that area carefully.
If it still has batteries on it, you should probably remove them and
clean
the circuit board in that area before battery leakage causes (more)
damage.
The battery is not required for startup or operation of the Lisa; it is
only to keep the clock running and preserve some preference settings in
RAM. Unlike a modern computer whose clock can run from the battery for
years with no external power, the Lisa battery only lasts for a few
hours
when external power is interrupted.
2) Bad COPS, or perhaps poor contact with its socket.
It may be enough to remove and re-insert the COPS to improve the
connection.
If not, replace the COPS with one from another I/O board... if it still
doesn't work, then it probably isn't the COPS.
3) A couple of other parts on the I/O board can fail causing this sort
of
problem, so if the above don't help, let us know and we can start
trouble-shooting.
Good luck!
James
James MacPhail "Think not of engineering as art,
[EMAIL PROTECTED] but of art as engineering"
Sigma Seven Systems Ltd.
[EMAIL PROTECTED] <http://SigmaSevenSystems.com>
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