In this video I investigate a Commodore C64 that has just gone bad sitting on the shelf for a while.

Chapters:
0:00 Intro
0:42 The GAL PLA
1:45 Reading the old GALs
4:45 Programming new GALs
7:12 Boot test
9:40 Cassette load test
11:43 Programming Right GAL
13:07 Boot test 2
13:28 Cassette load test 2
14:55 Conclusion


Links:
The eBay C64 Is Behaving Nicely! (but I have bad luck with GAL PLA's) -    • The eBay C64 Is Behaving Nicely! (but...  
PLA20V8 The Commodore 64 PLA that you can build yourself - https://www.freepascal.org/~daniel/c6...
Can you replace your C64 PLA for under $3? (Adrian's Digital Basement) -    • Can you replace your C64 PLA for unde...  
TL866II Plus Programmer - https://www.amazon.co.uk/gp/product/B...
GAL20V8B Chips from eBay - https://www.ebay.co.uk/itm/3929924722...