On Sat, 26 Aug 2017 06:11:09 -0700 (PDT),
wrote:

On Thursday, June 29, 2017 at 5:03:35 PM UTC-4, wrote:
Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Other times more intermittent but it would not go more than a few hours without the problem popping up. Replaced IC0102 (MN14834HH) Main IC for the Channel Selection Ckt but no help. Remote control IR circuit not the problem as I disabled it. Over time have replaced some bad unrelated hw (burnt resistor, Caps). Have schematics and service manual but can't isolate the problem. Nice picture and everything else works fine. Unit in storage but every 4 months or so, when I see it and think about it, I fire it up. Hate to trash this old tv. Kind of part of the family now. Has anyone ever heard of this before?

8/26/2017 One final note. It's been over 6 weeks now and the tv has worked fine since cleaning the 3-way switch. I guess it's fixed. Thanks for all your help guys.
You are welcome. I knew the switch would cause the tuner to go back to
channel 2. Back in the 80s, the sets weren't out long enough for the
switches to go intermittant.

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus