Marantz sr5001 has pcm light flashing after child pushed buttons on front of receiver. no longer getting audio/video in tv mode but other modes are still working without issue. how can I get audio/video back for tv?

I suppose pcm light means that the pcm mode is turned on (pcm meaning pulse code modulation), in other words, the unit was switched to digital signal, so if the digital rca or optical TV input on your reciever is not connected to anything, then you're not getting any signal into the reciever in digital mode. You probably just need to switch the unit back to analog mode (see if there is a button that says something like digital/analog, pcm/analog, optical/coax or similar, try pressing it, see if there is any change).

I might just be totally wrong on this, however, probably the best way to learn what happened is to read the user manual if you do have it (see what the pcm light signals for and check any chapters inside the manual related to that topic).

good luck

3rq8 (Triarcuate)