Old CRT monitors produce a lot of heat. Most issues with them are age-related due to heat making the wiring's insulation brittle and crumbly, causing short circuits.
Given that:
- A shorted wire is a serious fire hazard and,
- It is getting hard to find anyone qualified to work on CRTs at any cost,
...I would let that one die in piece. I cannot in good conscience recommend that anyone lacking professional credentials/training work on an old CRT due to fire and fatal amounts of electricity present. The shock hazard remains a issue long after the monitor is removed from a power source.
I work on a lot of computers both for family and friends. I can take apart most. I DO NOT work on CRT monitors because I am very fond of my wife's husband!