On Tuesday, December 11, 2012 4:10:49 AM UTC-5, David Farber wrote:
I hit the

switch button again and the problem still stayed with the smaller window.

The Sonys of that era used two tuners for main and pip, but didn't swap the video between large and small windows, but swapped the channel instructions for each tuner as the swap button was pushed. That's why the problem stays with the particular screen window.

Those tuners were combo tuner and IF, and are known to have issues with grounds and bad connections on coils. You can replace the pip tuner if you can find one, or pull it and resolder. Some of those TVs in that era used double sided boards, and require a decent technique to pull the tuner (green boards). If it has the brown board, it's an easy pull. BTW, although the tuners look identical but they're not, so make sure to identify the correct one by pulling the RF input lead off each tuner to confirm the pip goes to snow.