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Old 02 August 2020, 17:41   #1
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Join Date: Oct 2018
Location: Cologne / Germany
Posts: 15
Amiga 4000 - Black Screen


I'm working now sind some weeks on a Amiga 4000 Rev B Board.
I cleaned up the Varta damage and replaced the ICs in the area.

Checked all traces. Everything is fine. But I still get a black screen.
No Serial output with DiagROM. Tested another CPU Card. Same problem.
PSU and Voltages are okay. 15KHz at RGB out and 50Hz is okay.
Reset does not go from LOW to High.

The PowerLED does not "brighten" up. It still stays constant.

Any other clues what I can measure or test?
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