I tried turning on the Denon AVR 1804 one day and I had no display and no power. I performed the microprocessor reset procedure with no luck. Then, I opened it up and found the fuse in the bottom was blown...so I replaced it, retried microprocessor reset and tried powering up again. Blew the fuse again. Any suggestions?
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Re: No display; No power
Your unit has a hard short in it. This is usually a power supply problem. Most likely the rectifier has failed. This should be a relatively simple and inexpensive repair. Figure on $10 for parts plus the local labor rate.
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14 INITIALIZATION OF THE MICROPROCESSOR
When the indication of the display is not normal or when the operation of the unit does not shows the reasonable result, the initialization of the
microprocessor is required by the following procedure.
1 Switch off the unit and remove the AC cord from the wall
2 Hold the following AUTO button and PCM button, and plug
the AC cord into the outlet.
3 Check that the entire display is flashing with an interval of
about 1 second, and release your fingers from the 2 buttons
and the microprocessor will be initialized.
• If step 3 does not work, start over from step 1.
• If the microprocessor has been reset, all the button settings are
reset to the default values (the values set upon shipment from
• Calling out preset stations from the main unit‘s panel.
1 Press the TUNING PRESET button. TUNING
FUNCTION 2 Turn the FUNCTION knob and
select the desired station.
TV CD CDR/MD/TAPE RECEIVER
TUNER PHONO CD
Did you try to reset the unit? Resetting the unit has fixed every problem I have ever had......turn off unit.....hold down A+B at the same time then turn the unit back on...hold buttons for roughly 3 seconds....Let me know if it works.
Try this, turn off the unit and remove the AC power cord from the electrical outlet, Hold the AUTO button and PCM button and plug the unit back into the electrical outlet, if the display starts flashing with 1 second intervals then release the 2 buttons, this initialized the microprocessor
I read something the other day in the user manual about re-setting the microprocessors if the display doesn't display properly.
Turn the amp off.
Hold down the input mode & analog buttons while turning power on. The whole display should flash on & off at 1 sec intervals, then release the two buttons.
This resets the microprocessors & supposedly fixes display problems.