You are fixing a Monitor.
The big glass thing is the CRT
Calling the whole thing a "CRT" is an incredibly annoying species of "Computer person speak" which has no place in an electronics forum.
Lol, it's still using cathode ray tube technology, it's just a very highly developed distant cousin.
My rant was a bit "tongue in cheek", but it does annoy me.
The CRT is just one component of the equipment you are fixing, & the only component which utilises "cathode rays".
All the other active devices are semiconductor based.
Some people used to refer to cars as "motors", or transistor radios as "transistors".(& probably still do)
It sounded silly then, & it does now when the same thing is done with Monitors.
It can also be misleading to beginners.
On another thread someone was getting all overwrought about the dangers of CRT tubes because they read on a "computer" website that there was some large amount of lead inside the "CRT".
The website was, of course, referring to the whole Monitor, & including the amount of lead in the PCB & other soldered connections.