Odd sound issue with Yaris 2006

[Edwinem]

Hey all,

First-time poster on the forum (I hope I choose the right category).
I've been having an odd issue with my Toyota Yaris 2006 and thought that maybe someone on here has experienced it as well.

Every now and then (I can't seem to determine what causes it) the CD player starts displaying ERR1, won't play any sound, and won't eject my CD.
When that happens, the radio also only gives soft static.
Also, I hear a popping sound over the speakers when turning on my front lights. If I turn them off there's a popping sound again.
After a while the problem disappears and all is normal until it suddenly re-appears.

Any suggestions? 🙂