Subwoofer works in test mode on denon avr 790. but not any other time?

The amplifier for the sub has failed.

check that wire and fuse again and try to reset and try

It sounds like your TV is responding to the Denon remote. There may not be any way to stop it. I would just turn off the TV speakers and use the ones connected to the receiver. If you're using the TV speakers to make up for the lack of a center channel speaker on your receiver, it may be time to consider buying a good center channel speaker. The speakers provided in most modern flat panel TV's aren't very robust. The whole idea of having a receiver is to:

1. allow switching between various sources while using only one HDMI cable to connect to the TV.

2. Take advantage of surround sound in the 5.1, 7.1 channel mode receivers provide. When you have a good receiver connected to quality speakers and a good subwoofer you can really experience the music and sounds in a home theater environment.

You need to do the input assign. The receiver needs to be told which physical sockets are assigned to what buttons. Once you assign the inputs, then press the corresponding input button. So if you assign HDMI 1 to be your Satellite receiver on the TV/Sat button, then you'll get the sound

It sounds like the sub has an auto power mode, hence why it switches to red (off), so your system will not detect it. If there is any control to switch it on all the time do so and try it again. It must be green all the time during the test.

What's the make and model of the subwoofer? It sounds like it's a passive (unpowered) speaker.

http://www.retrevo.com/support/Denon-AVR-589-Receivers-manual/id/23110dj893/t/2/

See page 9

I seriously doubt your test mode worked fine on the subwoofer level adjustmnent.

Get a powered (active) sub.

press setup/configuration on your remote you'll get configuration menu, then goto 'speaker configuration' check if the subwoofer is on, check that front speakers and others are set as small. There also could be subwoofer mode settings, remember current setting and try to change it.

Hi,
If dvd combo player is only video source connected with Denon AVR 790 then unplug yellow video wire from Denon and plug it directly in TV input, now video signal will go directly to tv and sound will come from Denon AVR 790 speakers during dvd playback.
This is simple bypass that wont effect surround sound of dvd playback.
Let me know if you have additional question.
Thanks.

is the sub in speaker set A and sub in set B?
that was my problem on Denon DRA-455 with Eltax Linear 6.5

Can you explain about your system problem in detail.
So that it will easy for us to offer you better solution.