I hope someone on this thread can help me with my Macintosh TV. I just joined to make this post after stumbling across this thread.
I have a Macintosh TV that would not power up for years. No activity at all with the power button. Before it stopped working completely I booted off a floppy to use it as a TV as the internal hard drive was intermittent. For full capability I could boot off an external hard drive. Yesterday after seeing an ad on ebay for a recapped logic board I did a little research and there was a suggestion to replace the PRAM battery. I tried this and to my surprise the Mac booted up off the external drive and seemed to be fully functional.
I shut down the Mac and pulled the internal drive to inspect and clean it. After inserting it back in , the machine powered up but gave me the disk with ? mark on the screen. It would spit out the floppy as well. I tried depowering and repowering the external drive but no joy. I shut down the Mac and tried to power back up but to my dismay it went completely dead again. When I flip the power switch I hear the hum/buzz (CRT high power?). But no further action with the power key. I also tried the remote but nothing. I cleaned the logic board, there is not much evidence of capacitor leakage. I am wondering if this is more likely a power supply issue.
So I’m not sure what to try next. Any suggestions?
Thanks for any ideas.