Update firmware for denon e400

Your problem could be a bad dsp processor which is on the hdmi pcb, change that pcb and the problem should quit

If the DENON has an HDMI output, and your TV has an HDMI input, then use a HDMI cable. Then, use the TV's remote-control to select "source" (or "input") as 'HDMI 2' or 'HDMI 3' (assuming that you have been using 'HDMI 1' to watch TV).

Ask the manufacturer:

usa.denon.com/.../ProductDetail.aspx

Is the TV connected to the receiver with a digital connection (coax, or optical)?. Try setting it to PCM on the TV Some receivers don't like it when there is a break between tracks and the signal is lost. You won't get surround (but Pandora is just stereo anyway), but you can still use the Receiver's Dolby or DTS features to go multispeaker. Downside if of course that if you have other Multichannel audio sources through the TV, they may be lost. But it's worth checking..

You have a software glitch the processor board needs changed.

AVR-E400 has an RCA subwoofer output. This is a line level signal that must be connected to an ACTIVE subwoffer (has its own power amplifier) Also the source must contain subwoffer signal (5.1, 7.1, 9.1 surround sound etc) You will not get subwoffer signal from a stereo source such as audio CD, non-dolby type TV etc. Cheers, Don.

You should connect your source device to your receiver and then connect your receiver to your TV.

reset TV to factory defaults and then update firmware

After days of frustration the real problem was with the cable box. It needed a firmware update. Following forum advice I disconnected the cable box power cord for a few minutes, reconnected it, allowed the cable box to reinitialize. Turned off receiver and TV. Turned TV back on and set it to HDMI connection, turned on receiver and all worked fine. Great picture and sound.( Needed to buy an optical cable to go from the cable box to the receiver to get sound from the speaker system. )--the dirtybird