My avr nad t747. no audio out. function full working. hdmi out same no audio.

To connect your PC or Laptop to your Harman Kardon AVR 2600 you need to connect the HDMI cable output of your graphics card to one of the 4 HDMI inputs on the AVR 2600 receiver. The HDMI connector on the AVR 2600 labeled "HDMI Monitor" is on output and cannot be used as in input.

You need to select the corresponding input from the front of the AVR 2600 or using the remote. Next you need to make sure your have the HDMI output port selected on hour graphics card. This will probably not apply to your PC, but may require some settings from the function keys on your Laptop.

Note that you will probably need to also connect audio from your PC to your receiver as well. I would recommend you use HDMI cable with ver1.4 specification so that you have the best chance of getting audio over the HDMI. If you only get video, then run separate Toslink (optical) or RCA cables to get the audio to the system from the PC.

Hello, I am sorry about your issue. I suggest that you contact us at 800-229-1687 option #3 so that we can troubleshoot with you. Thank you, Onkyo USA

try pluging it in to the tv HDMI or mabe your receivor is not in the ring output

You could help by providing more info, such as manufacturer, equipment type, etc. What do you have plugged in? What is its power source, etc. Fuse?

You don't say if all speakers are silent or just the ones to the unspecified NAD power amp. Do ANY speakers work regardless of which device powers them? Could the NAD be the problem?

Let's treat this as TWO functions - audio and video.

Your best video would be HDMI output (audio & video) from the cable box and EACH other video source (BD/DVD) directly to your TV and receiver. But, I'd still WATCH the video from the direct TV connection. The fewer intervening cables and electronics, the better.

Your best audio performance will come directly from each multichannel source via a digital (HDMI, coaxial or optical) cable to the receiver. I would LISTEN to audio through the receiver for best quality.

See a trend here? TV's best at video; receiver is the master of audio.
And neither one adds much by handling the other. Usually the opposite.

You mention coax. Do you mean coaxial digital audio????? As coax is also shorthand for the thick black cable bringing video to most cable boxes, connecting antennae to TV's and such.

You don't actually define what the problem is. Only YOU can be the judge of what 'better' is.

There are a multitude of (mis)settings you should master before declaring a hardware problem. I'd dive into the manual.

Restoring your T 747 to its factory defaults: At FM mode, press and hold front panel’s LISTENING MODE button until the VFD shows “Factory Reset”.

Cheers!

get a fan or do a re-stack...open the back of the e-center, Yes it will do a thermal shutdown... just like 3 mile island

You say your connected from the DVD to the Denon with an HDMI cord and the Denon to the TV with an HDMI cord and you get no DVD video? can you get the Denon setup menu? if so change the res. output on the DVD to 480p, 720p or 1080i but not 1080p