I have Yamaha PSR E353 model keyboard, but I don't know kow to connect this keyboard to my home theater system.
I have used an Aux-In cable for this, but it’s not working.
How can I connect this keyboard to my home theater system?
I used Aux cable, and keyboard port name is Aux In
This is the problem! :)
As you will see from page 30 of the manual here, the Aux in port is when you want to play a song out of the Yamaha PSR E353's speakers:
If you want the sound to come out of the Yamaha, you need to use the PHONES/OUTPUT jack. Again from the manual:
...you may be able to use the same wire.