Aiwa amp PA

[Diane31]

just dug out my old Aiwa nsxv20 stereo both speakers work, but one side of the input on the back of the stereo where you put the speaker wire in doesn't work. I don't get sound from speaker, just a loud hum??? any ideas on how to fix it.

 

[soundguruman]

blown output transistor?

 

[Diane31]

is that a part I can buy and replace myself?