This episode is sponsored by PCBWay https://www.pcbway.com/ What should have been a relatively straightforward repair of an Oric Atmos, turned into a wild chase for the true source of the problem. Tests kept pointing me in one direction, but my gut told me it was something else. Support Noel's Retro Lab on Patreon: https://www.patreon.com/NoelsRetroLab You can also support Noel's Retro Lab on YouTube by joining this channel: null Chapters: 00:00 Intro 01:22 Look inside 03:43 Voltages 05:21 Clocks 08:16 RAM 09:17 Diagnostics ROM 12:50 RAM circuit 15:02 ULA 16:08 Power 18:51 Last try 20:38 Testing 21:13 Making sense of things 23:46 Conclusion Links: Oric diagnostics ROM https://oric.signal11.org.uk/html/diagrom.htm Blake's 7 https://www.defence-force.org/index.php?page=games&game=blakes7 Music tracks: Funky Stars by McKlain https://mcklain.bandcamp.com/track/funky-stars-amstrad-cpc-true-8bit-version Battro OST by McKlain https://mcklain.bandcamp.com/track/battro-ost More awesome music by McKlain: https://www.mcklain.com/ 🛠 Tools I use ➤ https://noelsretrolab.com/tools.html Connect with Noel's Retro Lab: Discord ➤ https://discord.gg/ETcCh6J Facebook ➤ https://www.facebook.com/NoelsRetroLab Twitter ➤ https://twitter.com/NoelsRetroLab Instagram ➤ https://www.instagram.com/NoelsRetroLab Mailing list ➤ https://noelsretrolab.com/