20 Most Recent Denon AVR-1908 - Page 2 Questions & Answers

please find reset instruction and some denon troubleshooting tips at ebcelectronics site

Hey Jim MacRae,Follow my tip for sound issue in lap and desktop systemsHow to troubleshoot if No Sound In Laptop And Desktop?Thank you

There's a clue there. Loud hum and tampering with wires changes something. Disconenct all speaker wires and see how that works out. Then add one at a time.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

You might want to disconnect the speakers at this point just in case they haven't been irreparably damaged by the amp problem.

Try the amp 'naked" (no speakers). Does it still cycle off? Take it to a technician. If it stays up try one speaker; then the next. At some point you will either have identified the failing component/channel or the failure will have gone away (doubtful).

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as another possible root cause for intermittent shutdown.

Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.

Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.

It's hot. Manual, page 65

http://www.retrevo.com/support/Denon-AVR-1908-Receivers-manual/id/5885ci670/t/2/

1. Turn of the unit using power switch (not standby button).
2. While pressing speaker1 and speaker2 butons, turn on power by power switch
3. Display flashes, release the speaker buttons, unit is reseted.

You probably don't have a problem with the speakers. Next time you turn the receiver on, before you put on any music, turn the volume control back and forth several times and see if you don't hear a hissing in the speakers. If so, the volume control needs cleaning inside. You can buy audio contact cleaner from Radio Shack. The best solution is to unplug the stereo unit, remove the top cover to expose the controls. Spray the cleaner into the controls (you might as well do them all while your in the unit). The cleaner is highly volatile and will remove dust and debris but leaves no residue. Once you complete this operation you can replace the top cover and the problem should be resolved. If not, you may need to repeat the procedure.
Note; Be patient. It takes time for dust to build up and time to remove it all.

Same problem overhere.... I just keep trying to turn it on and after approx. 10 times it stays on.

Maybe the audio IC are damaged and neeed to be replaced

How is everything connected? is everything hooked up to the reciever? just wondering cause now you say the sound now comes out of the tv? how is the dvd player hooked up does it go through the reciever or is it plugged into the tv now. If you can outline the details of your setup i can help assist you. That way i can understand how you have it hooked up and then help trouble shoot from there. Thanks, Midwest-tek

most electrical units have a fuse inside,try taking cover off and checking for blown fuse,or,take it to radio repair shop.My Harmon Kardon stopped after 3 years,and the report said the unit that failed was quite a common problem for the modern multi channel amps,quite cheap to fix..All my tips are free

You might want to review the manual below:

http://www.usa.denon.com/AVR-1908-OM-E_109.pdf

1) Make sure MASTER VOLUME is not set too low 2) MUTE should be OFF 3) Make sure nothing is plugged into the PHONES jack 4)Make sure the source program has a signal present - the inputs may not be connected to the selected source on the front panel (or try FM or AM for a source instead) 5) Check for proper connection at each of the speakers AND at the rear of the stereo. 6) Perform a microprocessor reset: a.Power the unit off, b. Press and release the "POWER" _while_ keeping both "Speaker A" and "Speaker B" buttons pressed. Once the display begins flashing in 1 second intervals, release both speaker buttons.

Hopefully, one of those steps will solve the issue. Please rate this reply if it was helpful - good luck!

On page 8 it says, "The on-screen display signals are not outputted from the HDMI MONITOR OUT".

Run a set of cable(s) from the Video- S-Video- or Component Video Out connectors to a compatible input on the TV.