Here's the thing : I bought an arranger for the first time, a Pa 500 from someone here in Tunis a few months ago. I had issues from the start as I can't seem to choose and play the sounds on the keyboard when I want. I know it's possible, cause the former owner showed me. I can sometime make the keys work but most of the time, the keys just don't make any sounds and they don"t get recognized as midi info in my Daw neither. The pitch knob works fine though. WHEN it works, it works from the moment I turn on the arranger.
I did read the manual and started in easy mode...ALSO, the former owner took away the on / off button on the keyboard, so you have to unplug it. You do with what you find in this country

Does anyone has a step by step process please ? Or could give me a clue ?
Cheers