This Commodore 64 main board had so many things wrong with it, it was a fun challenge to get it working again. Previous owner(s) had caused damage to the board by removing chips, which adds an extra layer of difficulty to troubleshooting. It all starts with the dead test cartridge doing nothing.

In this video, I show my techniques for troubleshooting and fixing all of the problems.

Video Links

Special thanks to IZ8DWF who has given me great advice on repairs:
   / @iz8dwf  

C64 main board schematics:
http://www.zimmers.net/anonftp/pub/cb...

Diode Symbols:
https://www.rapidtables.com/electric/...

Tools

Deoxit D5:
https://amzn.to/2VvOKy1
http://store.caig.com/s.nl/it.A/id.16...

Jonard Tools EX2 Chip Extractor:
https://amzn.to/2VazxDS
https://www.jonard.com/Products/EX2...

Wiha Chip Lifter:
https://amzn.to/3a9ftWw
https://www.wihatools.com/precisionc...

ORing Pick Set: (I use these to lift chips off boards)
https://amzn.to/3a9x54J

Elenco Electronics LP560 Logic Probe:
https://amzn.to/2VrT5lW

Hakko FR301 Desoldering Iron:
https://amzn.to/2ye6xC0

Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digi...

Head Worn Magnifying Goggles / Dual Lens FlipIn Head Magnifier:
https://amzn.to/3adRbuy

TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
https://amzn.to/2wG4tlP
https://www.aliexpress.com/item/33000...

TS100 Soldering Iron:
https://amzn.to/2K36dJ5
https://www.ebay.com/itm/TS10065WMI...

EEVBlog 121GW Multimeter:
https://www.eevblog.com/product/121gw/

DSLogic Basic Logic Analyzer:
https://amzn.to/2RDSDQw
https://www.ebay.com/itm/USBLogicDS...

Magnetic Screw Holder:
https://amzn.to/3b8LOhG
https://www.harborfreight.com/4inch...

Universal ZIP sockets: (clones, used on my ZIF64 test machine)
https://www.ebay.com/itm/14161820...

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/12510PCS...

Heat Sinks:
https://www.aliexpress.com/item/32537...

Little squeezy bottles: (available elsewhere too)
https://amzn.to/3b8LOOI

Links

My GitHub repository:
https://github.com/misterblack1?tab=r...

Commodore Computer Club (of Portland, Oregon and Vancouver, Washington)
https://www.commodorecomputerclub.com/

Tivoo Pixel Art Display seen in my videos:
https://www.amazon.com/DivoomTivoor...

C64 Stuff

JaffyDOS:
http://blog.worldofjani.com/?p=3544

C64 Test Harness I use:
   • Building a Commodore 64 Diagnostic Te...  

C64 Homebrew cartridge PCB: (used for the DeadTest / Diag Cart I use)
https://www.ebay.com/itm/Commodore64...

EasyFlash 3 MultiCart:
http://store.go4retro.com/easyflash3/

Instructional videos

My video on damagefree chip removal:
   • How to remove chips without damaging ...  

Music

Intro music by:
Nathan Divino
@itsnathandivino

Outro Music:
Abyss by | e s c p | https://escpmusic.bandcamp.com
Music promoted by https://www.freestockmusic.com
Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/...

Image Credits

None