I have an Apple IIe working on my personal museum. I leaved inactive for a year and now can't load DOS or ProDOS. The computer starts and stops with an indication 00DC- A=27 X=03 Y=FF P=35 S=P9. I suspect that a IC of ram is out. Can someone help me?
Anonymous
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Did you try to run the self diagnostic test?
If there is nothing wrong with the computer other than the RAM, then this test will tell you so.
To run the test, hold down the open and solid apple keys down while you turn on the computer.
But to tell you the truth, every iie that I have had so far (these are OLD) have had bad power supplies.
Maybe your problem is the power supply.
I would also suggest that the power supply is not coping, especially since the //e was in a known good state beforehand. An easy way to test for this is to remove all peripheral cards and see if the error message remains. If not, add cards back in one-by-one. If the error message returns, it's either the power supply is overloaded, or one of the cards is causing issues.