Jan Beta | Stubborn C64 Repair @JanBeta | Uploaded March 2021 | Updated October 2024, 3 hours ago.
I'm working on another Commodore 64 with a severe case of black screen. Not even the Dead Test cart gives me any reading! Am I going to be able to repair this? // Kindly sponsored by PCBWay - Get your first PCBs free! - pcbway.com

C64 Troubleshooting Resources: janbeta.net/c64-resources

Noel's recent C64 Repair videos (Part 1 & 2): youtu.be/8Bu_VMoiEIg

XCPLA PLA Replacement: hackup.net/2019/06/the-xcpla-yet-another-pla-replacement

PDF version of the C64 Programmer's Reference Guide: commodore.ca/manuals/c64_programmers_reference/c64-programmers_reference.htm

Desoldering Station ZD-915*:
DE: amzn.to/3jPh8qC
UK: amzn.to/3rU7WnL

TIME STAMPS:
0:00 Intro
1:53 Sponsor Message
2:18 First Inspection
4:24 Dead Test
7:08 Measuring Voltages
9:06 Finger Test
9:27 Shorted Kernal ROM
10:31 Broken RAM
14:00 Multiplexers?
16:00 Wonky Address Lines (A Red Herring)
18:46 PLA?
20:10 More Broken RAM?
21:40 CPU?
24:29 Even more broken RAM!
26:15 Comparing with a good C64
27:06 Replacing more RAM
28:10 U14 Logic? BASIC ROM?
29:30 Replacing ALL the RAM
30:23 Reset Circuit?
35:06 The Solution!
36:22 Final Tests
39:01 What was broken?
40:53 Reassembly
41:23 Thank you & Good Night

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MUSIC by FOCUS 10 focus10music.bandcamp.com

EQUIPMENT AND TOOLS I USE: kit.co/janbeta *
TWITTER: twitter.com/thejanbeta
PATREON: patreon.com/janbeta
WEBSITE: janbeta.net
TWITCH: twitch.tv/thejanbeta

YT CHANNEL MEMBERSHIP: youtube.com/channel/UCftUpOO4h9EgH0eDOZtjzcA/join

Thanks for watching!

This video was sponsored by PCBWay.

* 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 #Repair #PCBWay