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.

Denon AVR-788 | Answered on Apr 05, 2014

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.

Denon AVR-788 | Answered on Dec 10, 2013

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.

Denon AVR-788 | Answered on Aug 27, 2011

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!

Denon AVR-788 | Answered on Aug 18, 2011

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.

Denon AVR-788 | Answered on Jan 17, 2011

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

Denon AVR-788 | Answered on Nov 18, 2010

power output short ...need replaced

Denon AVR-788 | Answered on Dec 13, 2009

Check the link below:


Denon AVR-788 | Answered on Mar 28, 2009

return the unit

Denon AVR-788 | Answered on Jan 14, 2009

Hi Ray Lynam, for what you say, you could have a problem with the speaker output
I suggest you remove the cover and look for two F2 and F3 fuses of 4Amp each that correspond to the output of the speakers, check if they are burned, if so replace them, ONLY FOR FUSES OF EQUAL VALUE 4AMP, do not put more value because you could produce major damage, test the equipment and if they burn again, then if you have problems at the exit stage
In this case, look for a specialized technical service
I hope you can solve the problem
Greetings Franco Dosil

Hola Ray Lynam, por lo que comentas, podr?as tener problema en la salida de parlantes
Te sugiero retirar la tapa y buscar dos fusibles F2 y F3 de 4 Amp cada uno que corresponden a la salida de parlantes, controla si est?n quemados, si es asi reemplazalos, SOLO POR FUSIBLES DE IGUAL VALOR 4 AMP, no pongas de mayor valor porque podr?as producir un da?o mayor, prueba el equipo y si se vuelven a quemar, entonces si tiene problemas en la etapa de salida
En este caso busca un servicio t?cnico especializado
Espero que puedas resolver el problema
Saludos Franco Dosil


Denon Audio... | Answered Yesterday

I would guess it's the Surround Sound mode button. Various modes in Surround Sound do not use all 5 speakers. Often the button pressed repeatedly changes between the modes. So if you press it again it might restore the sound mode to the one you had. I can't be more specific as you did not give the model number.
You could try the Denon website to see if they have a free PDF of the user manual, if you have lost it. You will need the model number for that though.

Denon Audio... | Answered on Jul 22, 2019

Try unplugging it. Another thing is some units have a fuse in the back. Check the fuse with a multimeter for continuity. If meter shows OL then replace the fuse.

Denon Audio... | Answered on Jul 15, 2019

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