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  1. Defender - controls hang but game goes on

    Many thanks to everyone. I have bought my can of freeze spray, and if it is the PIA chip, I suspect the easiest solution will be to buy an interface board and see if it sorts the problem out, as I am not sure I am yet ready to to buy a logicprobe or inflict my soldering skills on my beloved...

  2. Defender - controls hang but game goes on

    Sorry about asking what the PIA chip is - I see you posted a photo - that chip seems cool enough but as you say I suppose it could be faulty

  3. Defender - controls hang but game goes on

    I have removed the interface board, checked the contacts and put back but no luck. All chips on the interface board cool. The only chips that appear warm are the main Microprocessor on the CPU Board (6809E), and the bank of RAM chips. Is this normal? Also what is the PIA chip (sorry for my...

  4. Defender - controls hang but game goes on

    Very many thanks for your detailed and helpful comments - it would make a lot of sense if it was the control interface board - I'll certainly try that first. In the meantime if anyone else has encountered similar problems or has additional ideas all comments gratefully received. Thanks again

  5. Defender - controls hang but game goes on

    Hi everyone, I hope someone can help me. This is my first post and I hope it is in the right location/forum but I am desperate for advice. I have had a Williams Defender (upright later system board)for about a year. It has played fine. Recently after a few minutes (now a few seconds) the...
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