1084S-P speaker issue

[boundedwum]

Hi there,

I have a 1084S-P that's new to me. I have replaced the flyback and it's working again. However I have noticed that the right speaker appears to be malfunctioning.

When the internal audio cable is connected it appears it might be an open loop, not sure if that's the correct term, it gives me no audio, but there is a constant soft hiss, which is not affected by the volume control, and is always present regardless of anything plugged into the corresponding RCA port. The left speaker is working completely fine.

Outside of checking for any cold solder joints, is anyone familiar and can point me in the right direction?

Thanks

 

[boundedwum]

Edit woops.

I resoldered the audio daughter board and got both speakers up, but I still have the background hissing/hum.

Maybe that's normal for these monitors? I haven't owned one before, my CM8833MK2 doesn't do it, but obviously they are different internally.

If I plug something into the 3.5mm jack, it silences it.