Aux port only playing one side on my home stereo

[dufumdummy365]

My stereo only plays one side through auxiliary RCA's what could be causing this and is it fixable

 

[americanaudiophile]

Did you try the aux input with more than one source?
Did you try a different cable?
It is possible to repair or replace the input jack itself if that's the problem. Not for the unskilled.
It's also possible that the input selector or another switch is causing the problem. With the stereo off operate all the switches and knobs 25-30 times. They may clean themselves by doing that. Controls you don't use can cause loss of a channel. They may also need to be cleaned internally with the proper contact cleaner.