Re: yes for 22 seconds! Message #9 Posted by Victor Koechli on 23 Oct 2003, 5:14 p.m., in response to message #8 by Frederic
In the C models, power has to be delivered to the RAM even if the calc is OFF. In your calc, that seems not to be the case. Turning off has the same effect on your machine as removing the battery: A built-in capacitor preserves memory for 22 seconds, then the capacitor is empty and your memory is erased.
Im not familiar with the ciruitry in the spices, but you should look for a trace (on the PCB or the flex ribbon) that supplies power to one of the chips without being interrupted by the power switch. That trace could be broken or have a bad contact somewhere. In fact, it would have to be broken somewhere between the battery and the capacitor.
Just thinking out loud, of course...
Good luck, and keep us posted.
Regards, Victor
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