Hoping someone can help me out. My Monitor II has been working almost flawlessly ever since I replaced the line capacitors, but lately it's making a noisy hissing noise for the first 15 minutes of operation. This noise descreases in volume before disappearing almost completely, however I can still hear very faint pops and crackles coming from inside the case.
I'm familiar with electronics but haven't been brave enough to discharge the monitor and clean around the anode cap, most posts online about this issue with other CRT monitors point towards a buildup of grime and dust being the main cause. It's not really that dirty inside, however I'm sure after 30 years of use, every part of it probably needs a clean.
Can anyone think of anything else I can try before I attempt to discharge and clean?
And additionally, is there anyone in Sydney Australia that can recommend a professional to do this for me? Perhaps a hobbyist that wouldn't mind helping me out?