Yes, and the snowy background I described running around the right edge will show the picture when connected to a signal source.
As I switch to PIP I'm able to get a very dark picture and the black area decreased in size
Thanks for the thorough answer. I found youtube on the replacement of the tcon board and availability of low cost replacement board. I'll try the cables as suggested and if that does not fix I'll take the gamble on the board.
Very impressed with the service. I supervised a team of technical support engineers for Tektronix for 25 years so I'm familiar with what you go through. Spend my days now far away from electronics where I run my own business as a gunsmith.
Thanks again Anthony.