How to switch to Optical Input AV 235

Pistick

Honorable
Dec 31, 2013
2
0
10,510
Hi everyone, so I'm having major issues with my Harmon Kardon AV 235. I try to switch to Optical on the digital input, but instead it stays at analog. I tried everything, I don't think it's my speakers because that doesn't have anything to do with this. The regular audio L/R cable works fine, my surround system plays fine, it's just it won't switch to the optical input when I want it to. Thanks for any answers in advance.