Posts by JeroenJ

Thanks again. I tried moving the CPU, but no improvement. I don't have another CPU ready, but I'll see if I can desolder one from a spare board.

I exchanged both CIA chips, but unfortunately that did not solve the problem.

There are no cartridges present in the expansion port.

Thanks Jens. I exchanged keyboards to see if that would improve things, but it made no difference. I'll check the other CIA this evening and have a close look at the board itself as well.

Thanks, however my board is a mk1 and both CIA chips are in regular sockets (or at least they are in mine). I have removed and replaced the chip two times now, but that has not altered the computer's behaviour.

Hi!

My C64 Reloaded mk1 developed a problem yesterday. Pressing one of the keys in vertical line 7 of the keyboard matrix (X, V, N, <comma>, and <cursor down>, but oddly not the <slash> key), results in a clear screen with "Ready." prompt, much like hitting <run-stop><restore>; sometimes the pressed character then appears at the cursor. When I hold <shift> and type any of the aforementioned keys, the expected graphical symbols appear on screen as they should, without this problematic behaviour.

Also, the built-in reset switch (pushing the power switch on the C64R mk1 up from the "on" position) now causes the computer to freeze.

Looking at the schematics I would expect the problem to lie in CIA chip #1. However, after swapping that IC out with at spare that I have showed no improvement. Is there anything else I could try or anything that I have overlooked?

Best regards and thanks in advance!

Jeroen