Did it work ok previously, or are you setting it up for the first time?
Hi, I haven't heard back from you yet - please reply and let me know if you still need assistance with this.
This problem is likely caused by a loose or broken cable.
I see that you have already disconnected/reconnected inputs - have you checked all cables and wiring for any sign of corrosion or damage?
Hi, just checking in on your question, do you need any further assistance?