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Helly my patrons! On this fine Monday I'm posting my next main channel video. It feels like I haven't fixed any C64s in a while, so how about we do five of them in one video! And unlike with normal C64 repairs, we are going to be working exclusively on 64C machines. 

I still have a pile of broken C64 machines down in the basement and I need to make space. So please let me know if I should make a video repairing those too, or should I just fix them off camera? 

Thanks for all the support!

Direct link: https://www.youtube.com/watch?v=EL6D5-62QeE

Files

Five bad Commodore 64s. One hour. All fixed!

Even though we have five broken Commodore 64C machines on the bench today, I still say this specific type of C64 is the most reliable of all. (Running on original hardware.) Let's see if I can get all five fixed in one video! --- Video Links Field Found C64: https://www.youtube.com/watch?v=wVphFkaX1gg Adrian's Digital Basement Merch store: https://my-store-c82bd2-2.creator-spring.com/ Adrian's Digital Basement ][ (Second Channel) https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g Support the channel on Patreon: https://www.patreon.com/adriansdigitalbasement -- Tools Deoxit D5: https://amzn.to/2VvOKy1 http://store.caig.com/s.nl/it.A/id.1602/.f O-Ring Pick Set: (I use these to lift chips off boards) https://amzn.to/3a9x54J Elenco Electronics LP-560 Logic Probe: https://amzn.to/2VrT5lW Hakko FR301 Desoldering Iron: https://amzn.to/2ye6xC0 Rigol DS1054Z Four Channel Oscilloscope: https://www.rigolna.com/products/digital-oscilloscopes/1000z/ Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier: https://amzn.to/3adRbuy TL866II Plus Chip Tester and EPROM programmer: (The MiniPro) https://amzn.to/2wG4tlP https://www.aliexpress.com/item/33000308958.html TS100 Soldering Iron: https://amzn.to/2K36dJ5 https://www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853 EEVBlog 121GW Multimeter: https://www.eevblog.com/product/121gw/ DSLogic Basic Logic Analyzer: https://amzn.to/2RDSDQw https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672 Magnetic Screw Holder: https://amzn.to/3b8LOhG https://www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html Universal ZIP sockets: (clones, used on my ZIF-64 test machine) https://www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971 RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI) http://www.retrotink.com/ Plato (Clone) Side Cutters: (order five) https://www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184 Heat Sinks: https://www.aliexpress.com/item/32537183709.html Little squeezy bottles: (available elsewhere too) https://amzn.to/3b8LOOI --- Links My GitHub repository: https://github.com/misterblack1?tab=repositories Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group https://www.commodorecomputerclub.com/ --- Instructional videos My video on damage-free chip removal: https://www.youtube.com/watch?v=XQVjwPsVFd8 --- Music Intro music and other tracks by: Nathan Divino @itsnathandivino

Comments

Edmond Shwayri

I am surprised you didn't check to see what those burnt pins connect to. Assuming it wasn't a defect in the chip, something shorted out those pins.

Edmond Shwayri

The RAM issues on so many motherboards... could it point to some sort of external RAM killing event? Maybe when the C64 power supply goes bad it injects high voltage into them?

adriansdigitalbasement

I would suspect that is the PSU were to output a high voltage, it would have had other collateral damage as well. I've had probably 10 machines come through the basement with this exact issue where the RAM chips shorted and got hot -- but there were no other faults. It's very mysterious!