Stubborn C64 Repair

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! - https://www.pcbway.com/

C64 Troubleshooting Resources: https://janbeta.net/c64-resources/

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

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

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

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

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Видео Stubborn C64 Repair канала Jan Beta