This C64 gave me visual clues as to which chips were bad

Sometimes diagnostic routines lie and give you false readings and that was the case with this broken C64. So let's use our eyes (to look at the symptoms) and some math to figure out which chips are actually causing the issues. -- Links Adrian's Digital Basement Merch store: Adrian's Digital Basement ][ (Second Channel) Support the channel on Patreon: -- Tools Deoxit D5: O-Ring Pick Set: (I use these to lift chips off boards) Elenco Electronics LP-560 Logic Probe: Hakko FR301 Desoldering Iron: Rigol DS1054Z Four Channel Oscilloscope: Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier: TL866II Plus Chip Tester and EPROM programmer: (The MiniPro) TS100 Soldering Iron: EEVBlog 121GW Multimeter: DSLogic Basic Logic Analyzer: Magnetic Screw Holder: Universal ZIP sockets: (clones, used on my ZIF-64 test machine) RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI) Plato (Clone) Side Cutters: (order five) Heat Sinks: Little squeezy bottles: (available elsewhere too) --- Links My GitHub repository: Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group --- Instructional videos My video on damage-free chip removal: --- Music Intro music and other tracks by: Nathan Divino @itsnathandivino