Commodore 1960 monitor

[Whaka]

the whine is totally normal, this is the flyback singing when sync frequencies move.
nothing serious at all

the real known issue on this monitor is that sometime you can hear a real big "pop" and the picture disappear during this "pop". then all back to normal.

this is an insulation problem, a capacitor discharge directly on the chassis.
i don't remember exactly where the leak is, but once the chassis is taped, it's fine.
they are not all affected by the way.

[Whaka]

i repeat myself, but flyback whining shortly at power on, and on modes switching are normal on the 1960.
this happend because synchro frequencies are moving during this time.
i have one who did that too, it's not a fault.

and poping sound may be the leakage i talked about. you can ask a repairman to check for that.
but if it's not a big "pop" wich happen randomly,  it's probably just crt static discharge when high voltage come and go, and it's not an issue, it's normal.
by the way, without listening... it's hard to tell.