Sinclair QL - RAM Repair and Minerva ROM

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Join me today, as I attempt to repair not one, but two Sinclair QL computers: one with a white screen on startup, and the other one with a solid green screen. This is a system that is completely new to me, so it will be an opportunity for all of us to learn the system together and see how to tackle a repair without previous system-specific knowledge or tools.

Chapters:
00:00 Intro
02:58 Teardown
06:40 Board layout
08:57 Initial test
11:48 Data bus check
13:08 Temperature check
14:47 Minerva ROM
16:13 Building an EPROM adapter
20:11 Tests with Minerva
22:02 Decoding RAM tests results
23:45 Repeating Minerva tests
25:59 Conclusion
Sinclair QL forum https://qlforum.co.uk/
Minerva ROM http://www.dilwyn.me.uk/qlrom/
Minerva code decoder https://www.nightfallcrew.com/minervaram/index.php

More QL videos from #QLvember: https://www.youtube.com/playlist?list=PLTvAnU1jefAJpqlW9QDl7Xmc0yhKKD8vR

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Видео Sinclair QL - RAM Repair and Minerva ROM канала Noel's Retro Lab