Head unit suddenly has no right channel

[Nick_S]

Today while driving to work I noticed my stereo only playing out of the left side. It's an older Alpine 9855 headunit running the rears off the HU and the fronts and sub on an amp. First I thought I may have bumped a wire doing my rear shocks the other day but the rears aren't playing either. Could it be the whole right side just fried itself? Is there a way to test it? Haven't touched anything else in the stereo since I installed it.

[Nick_S]

I'm stupid. My ipod in my glovebox came partially unattached. I haz a dumb.