My HD AV Pack is no longer outputting a working optical audio signal. The receiver acts as if nothing is connected. The AV box is producing the red light but it is noticeably dimmer when compared to my TV's optical output. I tried two optical cables and two XBoxes. Inside the HD AV pack, the optical audio section is on a mini PCB and has a tantalum cap, as shown in the photo. Could this cap be going bad and causing the LED to dim?