Narrow picture when set first comes on

[Dan Starnes]

My Admiral set (model C2256 N) that I watch frequently did not produce a picture when I turned it on tonite. I had sound, but no pic whatsoever. After about 1 minute I did what my Dad used to do, I slapped it on the side. A faint pic was produced, then a narrow picture, from side to side came. The images were not distorted. As the set warmed the picture filled to the entire screen, and looked as good as ever. I pulled out my Sams and and in the tube failure check chart a narrow picture could be caused by 5 different tubes. They are
Horiz mult
Horiz output
Damper
HV Rect
LV Rect
Slapping it on the side makes me wonder also if I have a bad pin connection.
Might get a chance to look at it tomorrow. Doing some maintenence on my 1960 Pontiac this weekend and the ole back is sure sore. Laying across an engine bay and installing points in a distributor in the rear of the engine hurts a whole lot more at 50 years of age then I remember when I did it the last time at age 40. Lots of room in those old engine bays, but 6'4" of me still says it is too small. But man, when I drive her, I am king of the road
Dan