With the missing HT diode replaced with a BA133 and source of the missing heaters found which turned out to be the plug not quite in on the board.

However it would not provide any line drive, replacing several capacitors on the horizontal oscillator board has restored the line drive which is a bit excessive at -97 volts.
The snowy raster looks good compared to set 1 which has a decidedly red tinge.
A problem has now shown up of which I have had no experience in for quite a few years, that being the tuner will not tune.
checking the voltages against the data I have found suggests I should have 33 volts ? at the tuner, which I do.
I may be in the wrong area which is why I need help to progress further please. The button bank is tested ok on set 1.
Any guidance gratefully received.
