Philips 202P40 22" CRT Monitor "weak heaters tube amp" Questions

...TUBE ) becomes weak - then 1 of the indication is ....picture becomes dull (less brightness & less contrast --- that noise is from EHT )........so solution is EHT ( also called as flyback ...

...weak cathode heater inside the CRT. One fix, besides what you are doing, is to replace the glass tube (crt) inside the monitor. Unless you can find a used one, may be hard to find now. It may also be ...