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Commodore 16 repair

This recently arrived and was unfortunately not powering up. Happy to say that after a bit of tender love and care it is now back up and running. I’m going to add some heatsinks to the processor and TED chips and since this machine only came with 16k it will get a much needed 64k upgrade. Parts are on order so watch this space for the final product

Retro deals of the day

Just need the Sinclair QL for the full set

Commodore 64C Keyboard repair

Retronerd Commodore 64C keyboard repair

Finally decided to repair the keyboard on this Commodore 64C. Thanks to Retroleum for providing the replacement number 9 key in exactly the right colour. Apologies but I have to put in the usual disclaimer. These steps worked for me so be careful and remember the risk is all yours. Step 1 Remove the three screws on the underside of the case as pictured Step 2 Separate the top and bottom halves of the case. Step 3 There is some tabs at the side holding the case together. Press in the sides in whilst gently forcing the top and bottom case apart where the screws were removed. Step 4 Once separated at the front and sides there are three clip hinges at the back which must be…

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Sharp MZ80A

Latest purchase needs a bit of work on the keyboard. These keys are going to take some finding. Letter ‘O’ and ‘INST / DEL’ keys missing. So if anyone has any ideas send me a note.  

Downloads

Download C64 Dead Test Diagnostic Manual (1988-Jan)  

Commodore 64 Repair

The latest on my C64 repair. I’ve tried a dead test cartridge and the result is that the screen flashes repeatedly. This indicates the processor is ok but that something else is broken. The number of flashes are supposed to represent an error code but I get constant flashing. The flash codes can viewed in the dead test catridge manual in this link C64_Dead_Test_Diagnostic_Manual_(1988-Jan) It must be said that the dead test cartridge can give misleading information and is to be used in conjunction with other testing methods. An example is that you may get a number of flashes identifying a ram chip but it may be the ram multiplexor is faulty so beware. I noted that a one of ram chips was running very hot…

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My First Commodore 64 since 1985

I received this from ebay last year. Unfortunately it does not work and just displays a black screen. At least the red led turns on. I decided to purchase a dead test cartridge to provide some clues as to what might be wrong.

Man Cave Loft Conversion

It started 20 years ago but finally the loft conversion it is nearing completion. It is really only this last year I have concentrated my efforts towards completing it. The driving factor behind this was the recent acquisition of a broken breadbin commodore 64. With no place to repair the breadbin I decided to finish the loft so I had a place to work. Here is a few “before” photos before I got stuck in.