I just purchased a used NAD receiver model 705 on eBay.
The unit is not working at all. It will power on (the power led turn on and I can hear the relay clicking).
The tuner display won't show any thing.
The amplifier section doesn't work.
I check all the fused inside and they all seemed to be OK.
Any advise for trouble shooting.
As the display lights are blown, you can't see that the unit is in the wrong 'listening' mode. USe the Listen switches to get to the input you are tring to use. The blown lights can be replaced with White or Blue 'wide beam' LED's, one leg connected in series to a 6k-ohm resistor.
The LED's inside the display are burnt out, thats all. When the green light is on the unit is in standby, ITS NOT ON. I just picked up one for $10 with same problem. Try to get something to shine on LED and you can see LED and switch it to the input mod you want, you'll quickly find out its ok. Good luck
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If the Nad has pre-amp out sockets that are currently connected to the power amp in the receiver. Then you can sever those link and put the pre-amp out into your Aragon inputs.
Otherwise I don't see how you can connect the amp.
marvidson, With the NAD model that you have and its lack of component or HMDI switching, the only way is to connect your system, sort of, backwards.
The only way to do it is to connect your digital cable box and blueray player directly to the tv, then the audio output from the tv to one of the video inputs on the NAD. The NAD has digital coaxial and toslink inputs so if your tv has one of them as an output, that would give you the best sound to the NAD. If your tv does not have either of those outputs, then you will be limited to the composite outputs (red and white) but that will still give you good sound.
Also, depending on the digital output to input configuration, you could possible find a converter online.
I got similar issue and managed to fix it with excellent tech support from NAD. Flashing LED means system goes in to protective mode. Most probable reason is presence of DC voltage on amplifier out puts. In my case it was both surround amps. It had faulty resistor and a dry jpint at power line
It is a known problem with this model. The source of the buzz is the Dsp power supply. On the DSP board itself there is a 2200my\f/16v capacitor that is defective . Usually the capacitor will turn brown and swells due to overheating. Replace it with a higher temp rating capacitor with the same capacitance and voltage specifications.
If your 2100ES has a selectable INPUT AND OUTPUT and if you're intending to send all signal to the power amp, i.e. not bi-wiring or using the 2100ES to run mid-range or treble then you simply send Left & Right audio (White & Red cable) from a 2100ES output, probably AUX OUT ( it doesn't really matter apart from Phono on some units) straight to the power amp on AUX IN.
We should be just dealing with audio here, so connect the NAD audio output to CD or DVD IN. Select CD or DVD IN on 2100ES input switch and switch output to AUX OUT (whatever you decided goes to the power amp) on the 2100ES. Turn power amp to AUX IN and it will now get an audio signal from the 2100ES for amplification.
Speakers connect to the power amp as a normal amp, so pos and neg etc. The 2100ES now only acts as a signal feed, the power amp does all the work.
So, summary - switch on the NAD, press play - video goes separately and audio goes to the 2100ES. Turn 2100ES to INPUT for NAD. Turn 2100ES to OUTPUT allocated for power amp. Turn INPUT on power amp to allocation for 2100ES.