I've said this here before but...
It is a common (and dangerous) misunderstanding that monitors must be discharged before working on them. This is simply WRONG! Monitor techs do not do this. I know because I used to be one!
The charge on a CRT tube can only bite you if you touch the final anode contact, and the only way you can do that is if you are separating the tube from the flyback and PCB for any reason. If you are handling the monitor it is impossible to touch this and the EHT voltage is not present on the PCB. It's only inside the tube and the tripler circuit in the flyback, all completely enclosed in plastic. There are, however, other capacitors which can give you a belt, on the PCB itself. These are not discharged even if you discharge the tube so never handle a monitor immediately after it has been powered off.
There is no more reason to discharge a tube than a car mechanic would drain a car fuel tank when working on an engine. Discharging a tube is dangerous, don't do it unless you have good reason!