Aux In line won't work for my Yamaha DGX-660

Title says most of the important stuff. I have a DGX-660 that I’m trying to connect to a loop pedal. I’ve connected the pedal and tested the output directly from the pedal, and I can hear stuff if I directly plug in my headphones to the pedal so I know the issue isn’t with the output.

The problem comes when I try to reroute the audio from the pedal back into the piano. I understand this setup is already less than ideal how I’ve described it, but it would in theory give me a way to loop using the speakers of the keyboard. Plugging anything into the "Aux In" port in the piano has yet to yield any sound.

I’ve plugged in both a phone and a TV into the Aux In port to see if there’s a way I can get the piano to output anything through the speakers, but it isn’t giving me anything.

My main concern is that the Aux In port is broken physically, which would be unfortunate because I don’t imagine that’s something I’ll be able to fix at home (or maybe at all.) I just wanted to see if I could get a second set of eyes to make sure I’m not missing anything obvious.

I’ve tested the aux cords, the 1/4 adapters and everything to ensure the issue isn’t with those components as well.

Any help would be greatly appreciated!