Sinclair QL - RAM Repair and Minerva ROM (Part 1)

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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/minerva...

More QL videos from #QLvember:    • #QLvember - Sinclair QL in November 2020  

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