[TV MAN]

You are saying the tube worked ok in another chassis? I had only read of testing. In my experience I had many times where I had tested a pix tube and it tested good on the tester, but wouldn't work well in the TV. Some others would test low, yet still produce a good picture. The old 21" round color tubes were known for that. Have you subbed the video out tube? May be back to it is just a lousy combination of small problems making a big problem.