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| Apple IIc 4100 - Horizontal Tetris boot screen |
Posted by: stansteph54 on 2025-02-08 14:03:23
Hi there,
Bad news tonight when trying my IIc which worked great 6 months earlier !
I do have a kind of Tetris horizontal boot screen !
Thanks |
Posted by: stansteph54 on 2025-02-10 12:21:12
the IIc is a 4100
I have tried today with another checked ROM 4X chip and the problem is the same.
5V voltage looks perfect on the Ram chips.
thanks for your input and help |
Posted by: bibilit on 2025-02-11 00:33:01
Have you tried removing the daughter ram board ? can be anything, including the processor. |
Posted by: stansteph54 on 2025-02-13 05:49:01
yes I did.
In the end, you were right, the 6503 processor was dead for totally unknown reason yet ! |
Posted by: Arbee on 2025-02-13 09:18:38
That's a little surprising. Dead 6502s aren't unheard of, but it's definitely rare. Glad it's up and running though! |
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