Commodore 64 with some strange problems
This poor Commodore 64 already been previously repaired by me but soffer of these new problems.
- Out of Memory
- Black Screen
- No Cursor.
- Garbage screen.
The problem of the black screen at irregular intervals with the out of memory was solved by replacing the CPU 6510, as soon as the CPU warms up a little more than normal the computer displayed only a black screen, cooling the CPU still did not work but at least something was displayed.
The problem of the out of memory are 4 dead ram + 1 previously replaced and i have decided to put in a socket the remain 3.
Last problem, there was no cursor and sometimes a garbage screen was displayed, as we all know the CIA 6526 in position U1 should be faulty due to the missing cursor.
Instead of CIA 6526 it was the socket of the 6569R3, replaced the socket the cursor is back and other annoying glitches disappeared.
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