20 Most Recent Denon AVR-788 Questions & Answers

I'm not familiar with your unit. However, this is normal, since the "sub" is encoded separately in movies. I have a separate sub for my front speakers. Or if you know what you're doing you can redirect the front signal to your sub by using a switcher when you're listening to cds, then switch back to surround when watching movies. But again, you have to be experienced in the principle of A/V configuration.

Not much information given, but if the picture was working before then you need to find what is different. If the source is still good, then look at changing or re-seating cables, especially HDMI if you are using that. If the signal path inside the receiver has failed you could perform a factory reset to defaults (see manual or Denon site) If that does not work then try a different video input/output. Finally, I assume you have checked your monitor.

The Dolby digital signal is outputted only through the Optical or Coaxial socket of the CBL box. you will have to get an optic fiber or coaxial cable depending which cable box you have and connect it to the digital input of the Denon receiver. The Denon's digital input are already assigned at the back. Eg: Optic input might be labeled CD so if you are connecting the CBL box to the optic input remember to select CD on the Denon to hear the cable sound, same goes with the coaxial input.

try to open the cover and inspect the mainboard a possible loose board occurs during movement and transport.use a soldering iron to resolder the pcboard specially the power supply section...this job is not for everybody but if you have the proper tools and a bacground in repair you may try but I would suggest to bring it a service center or ask the help of a skilled personnel in actual repair.
here's the tools you need

1.digital tester
2.soldering iron
3.soldering lead 5 meters
4.disoldering pump
5.screw driver philip
6 long nose plier.

be very careful be sure to unplug the unit before proceeding..good luck!

Could be a short on one or more of the speaker outputs. Try disconnecting all speakers and turning the unit on. If that works without a power-down then you have a short in one of the speaker connections. Re-connect them one at a time to detarmine which one it is, and then you should be able to correct the problem.

If that is not the cause then you have an internal problem with the avr which would be difficult to diagnose here.

Typical for that model. You have bad power supply or bad channel.
Thanks, ebcelectronics

power output short ...need replaced

Check the link below:


AVR-788

return the unit

The Denon DRA-697CI stereo receiver typically uses a 250V, 2.5A fuse. However, it's always a good idea to consult the user manual or check the label near the power input on the device itself to confirm the exact fuse size and specifications for your particular model. Using the correct fuse size is important for safety and to prevent damage to the receiver. If you're unsure, you can also contact Denon customer support for assistance.

The Denon DRA-697CI is a stereo receiver. Typically, the fuse size for electronic devices like stereo receivers is listed in the device's manual or on a label near the power input. It's important to use the correct fuse size to ensure proper protection against electrical faults. Without specific information about the fuse size for the Denon DRA-697CI, I recommend consulting the device's manual or contacting Denon's customer support for accurate information. Using the wrong fuse size can potentially damage the device or pose a safety hazard, so it's crucial to verify the correct specifications.

Check and clean the dampening piston(s) associated with the raise / lower mechanism. The silicon oil may have dried up or leaked out.

More than likely the mosfets are shorted in the output stage.

https://instrumentalparts.com/denon-dnd9000-traverse-unit-w-laser-sled-disc-motors/ I think they are now obsolete but the laser assembly and motor, (the only parts that fail) are still available.

Question edited for a lot more clarity and add maker. Question moved from Cars and Trucks category.

Denon AVR Panel lock function

Denon https://support.denon.com > answers > detail > a_id Yes. All our newer AVRs have a procedure to lock out the front panel to keep accidental button presses from occurring. This is a push button procedure and ...

Canceling the Panel lock function AVR-S640H

Denon https://manuals.denon.com > SEHFSYojjpdajr Canceling the Panel lock function · Press Power Button while you press and hold TUNER PRESET CH + and TUNE + with the unit in standby mode. · Press TUNE + or TUNE ... People also ask How do you unlock the panel on a Denon receiver?"); display: inline-block; height: 24px; width: 24px;"> How do I reset my Denon AVR 1509?"); display: inline-block; height: 24px; width: 24px;"> How do I turn off the panel lock on my Denon AVR s540bt?"); display: inline-block; height: 24px; width: 24px;"> Feedback

Panel lock function NR1509

Marantz https://manuals.marantz.com > SEHFSYeumlhqks Panel lock function ... To prevent accidental operation of this unit, you can disable operation of the buttons on the front panel. Open Front Key Lock N59. Basic. ..