I decided this morning I would test the #Commodore64 I got the other day and see what condition it's in. The case is in good shape. Powering the system on gave me a power LED, but no video. After putting in the deadtest cart and wiggling the switch I got a black screen, but no test screen or flashes.
The case screws are worn and after taking off the cardboard RF shield it's even more evident that someone has been inside. A couple of the failure-prone MT 4264 RAM chips have been replaced with 4164 and 8264 chips. Only one RAM chip is socketed.
I noticed U4 KERNAL ROM was getting hot, so I removed it and got a 5 flashes l, but also 2 flashes from the deadtest cart.
To do:
* Remove RAM
* Install sockets for RAM
* Install new RAM and run dead test/diag
* Replace faulty KERNAL ROM
* Bath time for case
#Commodore64Forever #retroComputing #electronics #8bit #8bitMicro #8bitComputer