(Not really a TV but the computer forums are starting to ignore CRT repair problems now that LCD's are everywhere)
I have a display here for an early computer graphics workstation and the monitor is a little sick. It's a Hitachi 21" model fixed for for 1280x1024@60hz but the branding has been stripped and replaced with markings from Silicon Graphics.
Internally it indicates the tube is a M48JLK22X.
The main issues I've run across are overall focus issues and the image gradually becomes fuzzy from the center outwards until it's totally unreadable. My assumption there is a recap is in order but I'm a little more concerned about the right side of the screen which has taken on a reddish tint and an amount of horizontal image bleed. The screen uses a manual degauss circuit but while I can verify the circuit works it doesn't seem to be a magnetism issue. Could it be a dislodged shadow mask or should I not be evaluating that until a recap is completed?