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| Apple IIc blinking power light |
Posted by: bibilit on 2019-09-13 11:54:52
This is due to bad ram chips probably
one or more chips imho.
Piggybacking new ones can help
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Posted by: Arths on 2019-09-13 12:07:22
Might be a possibility, RAM chip are MT4264 right ?
I've read online that I can also use 4164 chips.
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Posted by: bibilit on 2019-09-13 14:07:53
Yes 4264-15
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Posted by: Arths on 2019-09-13 14:10:05
Yes 4264-15 Mine uses TMS4164, must be an early revision of the IIc.
According to this site, they should be compatible anyway.
Ordered five chips from AliExpress, they should arrive in 2 to 3 weeks.
Thanks for your advice 🙂
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Posted by: Arths on 2019-10-07 09:26:10
Hi guys,
Just received the chips, tried piggybacking but that doesn’t seem to change anything. :/
Maybe there are specific chips I shall try this method on ?
If you have any idea, please let me know :'(
Thanks
Edit : Piggybacking F18 makes horizontal white bars but that's it
Arths
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Posted by: bibilit on 2019-10-07 12:28:27
Problem is you can have more than one faulty unit. Sometimes not easy to troubleshoot, but a slight change can indicate the faulty chip
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Posted by: Arths on 2019-10-08 03:23:20
Problem is you can have more than one faulty unit. Sometimes not easy to troubleshoot, but a slight change can indicate the faulty chip I’ve changed chip F18 and I now have solid horizontal white bars. Another thing is that I seem to loose composite signal every 2 seconds, maybe a clock issue ?
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Posted by: bibilit on 2019-10-11 00:30:37
Have you tried the piggybacking procedure once more on the remaining chips ? can be frustrating but again more than one chip can be bad.
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Posted by: Arths on 2019-10-11 00:33:48
Absolutely, but that did not change anything 🙁
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