Posted By
crock
on 2012-01-20
05:32:56
 |  Re: Plus 4 Fix help?
Is it a modern TV? Do you know if it's an NTSC or PAL machine? It's possible the TV doesn't support the TV standard of your Plus/4.
If it was a black screen proper, th usual culprits in descending order of likelhood are the CPU (7501/8501), the TED chip (7360/8360), RAM circuitry, PLA and then everything else.
WHat makes me think this is unlikely is that when you say the tape works, do you mean that the spindles go round when you press play? If so, when you press stop, can you still hear the motor running in the cassette deck? If the motor only runs when you press play, this is good news, because the computer controls the cassette motor through software when it senses you have pressed play which means that the machine is running, but you can't see the display.
Rob
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