C64 Black Screen Repair (MT RAM Chips)

I'm troubleshooting and repairing another black/blank screen Commodore 64 board in this episode. // Kindly sponsored by PCBWay - Get your first PCBs free! - https://www.pcbway.com/ Commodore PCB Reproductions at Bob's Bits Tindie Store: https://www.tindie.com/stores/bobsbits/ Boelle's 326298 C64 Board Replica on GitHub: https://github.com/boelle/326298-Rev-A-Kicad bwack's KU-14194HB C64 Board Replica on GitHub: https://github.com/bwack/KU-14194HB-RevB-KiCad Here's some handy resources I refer to when troubleshooting and repairing C64s: The Pictorial C64 Fault Guide is here: http://derbian.webs.com/c64diag/ Ray Carlsen's troubleshooting and repair guides are here: http://personalpages.tds.net/~rcarlsen/cbm.html You can get the .bin files for various C64 diagnostics cartridges from World of Jani (in case you want to make your own or try in an emulator): http://blog.worldofjani.com/?p=164 Here's the GitHub with Sven's diagnostics harness: https://github.com/svenpetersen1965/C64-Diagnostic-Rev.-586220-Harness Time stamps: 0:00 Introduction 2:38 Inspection & Checking Voltages 7:08 Populating the Board 8:33 The Difference between Dead Test & Diagnostic Cartridge 10:55 Finding a faulty RAM IC 12:53 Replacing RAM (with Soldering tips) 17:20 Finding and replacing more faulty RAM 19:41 Finding even more faulty RAM 21:03 Still more broken RAM? 21:36 Replacing ALL the RAM ICs 23:45 Testing the repaired Board 27:30 Thank you and Good Night! ----------------------------------------­------ Music by Focus 10 https://soundcloud.com/user-993847645 EQUIPMENT AND TOOLS I USE: https://kit.co/janbeta * TWITTER: https://twitter.com/thejanbeta PATREON: https://patreon.com/janbeta WEBSITE: https://www.janbeta.net TWITCH: https://www.twitch.tv/thejanbeta LBRY: https://open.lbry.com/@janbeta:b YT CHANNEL MEMBERSHIP: https://www.youtube.com/channel/UCftUpOO4h9EgH0eDOZtjzcA/join Thanks for watching! * Stuff marked with "*" contains affiliate links. You don't pay anything extra and I get a little commission from everything you buy through the links (even if you buy something different there). #JanBeta #Commodore #C64 #PCBWay