It's been a while since I've had a crt TV on my bench...
This one is used as a monitor only..
I strongly suspect a psu issue ...
The red standby led takes a long time to light up ...and when it finally does pulses bright and then dim.
I have detected a faint raster on occasions ...and monitoring the supply line both on and off load (120v I think) ..
This is low around 65v and fluctuates considerably ..
I therefore suspect psu rather than anything else.
This is the set with a side mounted 12v input/invertor ..and takes 2 different leads with the required input socket sliding left or right to select.
A blast from the past but maybe one of the older generation engineers have a stock fault for listed for this ?
rgds
Evan