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Old 04 October 2019, 12:48   #5
Cav
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Join Date: Jan 2019
Location: Sundsvall
Posts: 31
Quote:
Originally Posted by FOL View Post
That sounds normal to me, A4000 is picky on modules used for Chip RAM.
Switching jump always forces it to 1MB. What happens if you remove all RAM, you should get Green screen. No green scren means board damage.

For Fast RAM, hooverphonique is correct. Leakage over RAM latch chip with cause that.
I'm not sure from the top of my head if I get green screen without chip when running standard ROM.
I'm mainly using DiagROM when fault tracing...

If I remove the chip ram SIMM i do get the same result as I most of the times get when I start it with standard jumper settings.

The SIMMs are known working in my other A4000.



All traces to both chip and fastram sockets are tested ok. ..
Board is cleaned 2, 3 and 4 times... :P
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