Crackling noise in left channel.

[fritz39]

I have an old Kyocera R851 that has started to make noise. The
left channel has a crackling noise when I first turn on the unit. After
a few minutes the noise goes away. I was thinking it could be a
cold solder joint or dying output device. I don't know how to
trouble shoot something like this so any help would be appreciated.

Thanks.

 

[kevvywevvywoo]

sounds like leakage through a coupling cap. Freezer spray may help find which one.