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Tag: amiga 4000

Amiga 4000 RTC not found

2 November 20217 December 2021 TSB Leave a comment

Sometime a RTC doesn’t work on an Amiga 4000. It can be a trace or via, but if they are all connected and test good the most common issue with this is a “floating” ground (pin 8) of U177. Or the RP5C01 RTC chip is dead 🙂 If we check the ground pin we see a […]

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Amiga 4000 – A3640 boot problem

24 January 20217 January 2022 TSB Leave a comment

A while ago I had an Amiga 4000 that boots fine with an A3630, but A3640 (or A3660) won’t boot. I spent many hours to find the problem, couldn’t find it. So I left the board for a week or two, after that I inspected everything again, and everything seemed ok. There was one thing […]

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Recent Posts

  • Amiga CD32 S-Video no colour 14 November 2021
  • Amiga 4000 RTC not found 2 November 2021
  • Amiga with 2 internal drives (gotek & diskdrive) (Poor men solution) 15 September 2021
  • Amiga CD32 SX-32 MK2 problem 23 April 2021
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