Television and Home Theater

I have a Mitsubishi WS65909 diamond series that about a year ago I successfully replaced the  convergence IC and fuses thanks to information from this forum.  About 3 months ago while watching a DVD I see a pixel is out then another then another and the longer I watch the more pixels I lose.  I do a hard reset on the set and the pixels come back.  This only happens when I am watching 480p material.  If I am on the cable box that delivers 1080i I am good no pixels drop.  This set still delivers a good quality picture and I was confident after I replaced the conv

Sony Model KP 53S15 Projection TV July 1995

CURRENT CONDITIONS AS OF THIS POST - Initial turn-on 2 rapid clicks from relays (no 3^rd click), standby light blinks continuously with no pause, stereo light comes on steady, audio is good on all channels, no PIP, no Display of any kind, filament voltage glows in the neck of each tube (not measured) (Found with lights off).

26" lcd with no video, have audio. Have good video and audio from the A/V jacks. I am thinking T-con board at this time.   does anyone know how to test if the video signal is comming to the T-con? ( like maybe a way to scope the input to T-con). I do have 5V on the fuse. the T-con board is V260B1-C01. I have cleaned the cable contacts from the main board to the output of T-con.

What does T-con stand for?

Thanks

Charlie