Low Speaker Volume Receiver How Do I Fix A Home Stereo Receiver That Intermittently Stops Playing Through The Left Speakers?

How do I fix a home stereo receiver that intermittently stops playing through the left speakers? - low speaker volume receiver

I'm at the age of 10-15 years, the origin of the LXI standard stereo receiver that has 4 speaker outputs (2 right, 2 left) and works well, except sometimes when the volume is low, left-channel speaker come, or just win "Audio Output Jack T. As the volume and keep it there, it" deletes "the connection and work both sides, but you can not always late at night when I want my music sweet. Is there something wrong with the connections or is it just dirty? "I could not say to a receiver in a car engine, so if someone would answer, I made a brief statement, such as access, when you talk to may .