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  1. B

    C64C fault diagnosis

    I have a c64C which is showing a very similar fault to this: The pictorial fault guide suggested that this fault could be caused by a faulty 7406 (U8) or 2 other 74LS14s - because I have the parts & wishfully thinking these may be relabelled on the 64c I replaced U23 (74LS14) & U22 (7406) -...
  2. B

    1541 red light constantly on, spindle behaving as expected, drive not responding.

    Hi, I have a 1540050 Rev C 1541 that is exhibiting a behaviour that I can't find any information on. When powered on (connected via serial to a C64) the red light comes on, spindle turns for usual second or so then stops, red light stays on. I swapped in all the main IC's ( UB4, UB3, UB2...
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