Help troubleshooting broken Denon AVR-8500

[bo_knows]

My Denon X8500 stopped working today.

It powers on but has no sound.

I don't hear the clicking of the relays when I switch the source, mute on/off, or plug the headphones.

All my input sources (TV and Blu-ray) are HDMI.

Cold to the touch.

Any suggestions are welcomed.

 

[AdamG]

My Denon X8500 stopped working today.

It powers on but has no sound.

I don't hear the clicking of the relays when I switch the source, mute on/off, or plug the headphones.

All my input sources (TV and Blu-ray) are HDMI.

Cold to the touch.

Any suggestions are welcomed.

Hi Bo,

Sorry to hear about your Amp problems. That sucks!

You can try several methods to Restart, Reboot, and Reset your Denon. The process for these functions are outlined in the below linked thread. Go to Post #3 and try these in succeeding order. I recommend you first just try the unplug from power for 5 mins and then plug in and test. When you unplug the unit hit the power button a few times to drain any residual power. Good luck Sir.

https://www.avsforum.com/threads/the-official-denon-avr-x8500h-13-2ch-flagship-avr-thread.2952552/

 

[bo_knows]

Hi Bo,

Sorry to hear about your Amp problems. That sucks!

You can try several methods to Restart, Reboot, and Reset your Denon. The process for these functions are outlined in the below linked thread. Go to Post #3 and try these in succeeding order. I recommend you first just try the unplug from power for 5 mins and then plug in and test. When you unplug the unit hit the power button a few times to drain any residual power. Good luck Sir.

https://www.avsforum.com/threads/the-official-denon-avr-x8500h-13-2ch-flagship-avr-thread.2952552/

Hi Adam,

Yes, this sucks big time.

Thank you for the instruction, greatly appreciated!

Bo

 

[bo_knows]

Hi Bo,

Sorry to hear about your Amp problems. That sucks!

You can try several methods to Restart, Reboot, and Reset your Denon. The process for these functions are outlined in the below linked thread. Go to Post #3 and try these in succeeding order. I recommend you first just try the unplug from power for 5 mins and then plug in and test. When you unplug the unit hit the power button a few times to drain any residual power. Good luck Sir.

https://www.avsforum.com/threads/the-official-denon-avr-x8500h-13-2ch-flagship-avr-thread.2952552/

Just got back from the gym and plugged the AVR and the same issue persist.

I just don't hear that main click from the relay when the amp goes from stand-by to operation state.

It would be helpful if someone can share Denon's repair manual or tell me what points need to be tested for what voltage.

Also, do you think I need to create the new thread or this one will do?

 

[Sal1950]

Just got back from the gym and plugged the AVR and the same issue persist.

Did you try any of this?

https://www.avsforum.com/threads/the-official-denon-avr-x8500h-13-2ch-flagship-avr-thread.2952552/post-55570184

 

[bo_knows]

Did you try any of this?

https://www.avsforum.com/threads/the-official-denon-avr-x8500h-13-2ch-flagship-avr-thread.2952552/post-55570184

Hi

Hi Sal,

Per Adam's earlier advice I'm doing a factory reset at the moment, other resets didn't help.

 

[AdamG]

Hi Sal,

Per Adam's earlier advice I'm doing a factory reset at the moment, other resets didn't help.

Sometimes you may have to do 2, 3,4 and 5 resets in a row. Sounds like the AVR is not sensing an proper input signal. Try another input you know works and possibly swap HDMI cable’s. The unit is turning on. But not assigning the channel amps. The problem could be as simple as a lose or defective hdmi cable.

 

[AdamG]

Just got back from the gym and plugged the AVR and the same issue persist.

I just don't hear that main click from the relay when the amp goes from stand-by to operation state.

It would be helpful if someone can share Denon's repair manual or tell me what points need to be tested for what voltage.

Also, do you think I need to create the new thread or this one will do?

Yes, if you continue to need assistance. Please start a new thread. Thank you for your understanding.

 

[bo_knows]

Yes, if you continue to need assistance. Please start a new thread. Thank you for your understanding.

No need. I doubt I would get any further without the repair manual. I guess I join the group of unlucky souls that purchase Denon hardware and it died on them.

Thank you for your assistance, I did all 3 steps and all the resets. Also, tried to bypass the HDMI board by plugging the CD directly into the analog inputs.

I got the same result, something is majorly wrong with the AVR.

Oh well... Life goes on.

 

[HarmonicTHD]

No need. I doubt I would get any further without the repair manual. I guess I join the group of unlucky souls that purchase Denon hardware and it died on them.

Thank you for your assistance, I did all 3 steps and all the resets. Also, tried to bypass the HDMI board by plugging the CD directly into the analog inputs.

I got the same result, something is majorly wrong with the AVR.

Oh well... Life goes on.

Sorry to hear. Out of warranty I presume? Did you contact Denon regardless?

 

[bo_knows]

Sorry to hear. Out of warranty I presume? Did you contact Denon regardless?

Thanks, I will contact Safe&Sound first then Denon.

 

[Sal1950]

Thanks, I will contact Safe&Sound first then Denon.

That's a real bummer Bo, sorry to hear it.
In my experience the D-M gear is among the most reliable, bug free gear around.
Best of luck to you.

 

[Doodski]

@bo_knows apparently service manuals are available here>

DENON AVR-X8500H, AVC-X8500H Service Manual – Service-Manual.net

Denon AVR X8500H AVC X8500H original service manual an

Denon AVR X8500H AVC X8500H receiver and amplifier original service, reapair and factory technicians guide.This is the exact same manual which is used by all official Denon technicians and maintenance employees. This guide will provide you with all technical service info in order to service, repair

serviceandrepair.sellfy.store

 

[bo_knows]

I just unplugged EVERYTHING and hooked up only the CD player via RCA connection and listened via headphones (HD660S).

I can faintly hear the music when I turn the volume all the way to -7. I'm assuming the pre-amp section is causing this to be heard.

Amps are just not engaging. Checked one fuse on what I assume to be the power supply board (same board that's housing the two main capacitors) and it was OK.

 

[bo_knows]

@bo_knows apparently service manuals are available here>

DENON AVR-X8500H, AVC-X8500H Service Manual – Service-Manual.net

Denon AVR X8500H AVC X8500H original service manual an

Denon AVR X8500H AVC X8500H receiver and amplifier original service, reapair and factory technicians guide.This is the exact same manual which is used by all official Denon technicians and maintenance employees. This guide will provide you with all technical service info in order to service, repair

serviceandrepair.sellfy.store

Thank you! You are awesome. This will be the last resort if I end up troubleshooting the unit myself.

 

[Chrispy]

I just unplugged EVERYTHING and hooked up only the CD player via RCA connection and listened via headphones (HD660S).

I can faintly hear the music when I turn the volume all the way to -7. I'm assuming the pre-amp section is causing this to be heard.

Amps are just not engaging. Checked one fuse on what I assume to be the power supply board (same board that's housing the two main capacitors) and it was OK.

What's your input assignment setting? Is it for analog on the input you're using?

 

[Doodski]

Thank you! You are awesome. This will be the last resort if I end up troubleshooting the unit myself.

If you decide to troubleshoot it I and I am sure others here can help if required.

 

[AdamG]

Started a new thread here. Good luck.

 

[Doodski]

Amps are just not engaging.

Protection circuitry may be engaged.

Checked one fuse on what I assume to be the power supply board (same board that's housing the two main capacitors) and it was OK.

That would (probably) be the mains AC fuse. It will not always open if there is a amplifier issue. Do you have a oscilloscope or a decent multimeter with decent probes? Just asking so we know for later maybe.

 

[bo_knows]

Started a new thread here. Good luck.

Thanks!