Intermittend no audio from digital inputs, flicker video monitor out, volume goes up but not down
Lately the T762 has been acting up a bit. First I noticed that the monitor video out started to flicker with grey background as if the vertical sync is out, the OSD menu's almost useless. Then, intermittently, the digital input often stop working (not just one input, but any of the digital inputs that connected to PS3, Sattelite DVR, and DVD via either coax or optical links all exhibit the same behavior) The latest being that the volume goes up, but barely goes down, condition is worse with use of remote controller.
Except the flicker video out, the other conditions do not exist when the machine is cold. After having used for about 45 min to 1 hr mild use (ie just watching tv and relatively low volume) the condition started to show up.
NAD had yet to responde... has anyone had similar issue and if it has been fixed?
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Re: Intermittend no audio from digital inputs, flicker...
Since the problem appears only after the unit has been run for a while, I'd be looking for any part close to a heat source. The odd behavior suggests that there is noise on the data lines for the volume control chip and the digital processing areas. Look for a bad 5V regulator +/or bad caps on the 5V line. Also check for poor solder connections in the power supply and final output stages.
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Did the volume control get an impact? Could be internal damage to the digital control. Did it act up prior to this non-function, like volume went up on a down command or jump up or down when a slight turn was made? Thnose would reinforce a damaged volume control.
What cable did you hook up your dvd? The 5.1 sound works only with optical cable or HDMI. Check in the input settings wich one is selected. With the analog cable ( Stereo RCA) is not working. Good luck!
What does your sound card have for audio outputs? Mine (M7250N Media Center) has all the expected 7.1 analog audio outputs AND a digital S/PDIF audio output that I run to my receiver's coaxial digital input.
Even if you have just 2-channel audio on your PC the headphone output can be used with an adapter that makes it conenct to a standard RCA audio cable. Run it to any available Linme Level input on the Denon. Get into your sound controls on the PC and make sure your Master Volume is unmuted and adjust whatever else applies to your machine that may affect the audio.
Your monitor is not really a player in this scenario.
Your symptom sounds like a poor digital connection. The receiver is probably configured to prefer the digital feed if both digital and analog are present from a given source. That it blinks the 'analog' indicator means it thinks the digital signal is degraded.
I believe you're using HDMI. If your cable box has either optical or coaxial digital outputs, try one or both and proceed from there. You could also certify the health of the receiver input that's failing by connecting another device (your Blu-Ray?) to it to test it out, or simply borrow its cable.
If the input works with another device THAT would indicate a problem upstream and external from the receiver - cable, output of the cable box. Optical cables are more finicky than coaxial and do not tolerate being routed in tight radious bends.
If you can solder, examine the pins for the display itself. In particular, look at the pins at either end. These are the power and ground pins. These often develop poor solder connections. Try resoldering these pins and update this with the results.
Try reseating the prologic/output board. Second one from the right (from the front of the reciever), that fixed my no sound problems on many channels. You will have to take out a few screws to remove and reseat it, and while you are at it clean the connections.