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The display showes PROTECTOR nad no sound - NAD Audio Players & Recorders

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Nad av 716 protect


If your NAD amplifier is in protect mode with no speakers connected, it will be necessary to open it up and check for internal component failure.

Jan 05, 2015 | NAD Audio Players & Recorders

1 Answer

NAD T752 display totally lit up. FM sound works but no frequency display.


Sounds like display driver board {IC} has damaged. Contact any service technician. Electro help

Dec 08, 2014 | NAD T752 A/v Surround Sound Receiver

1 Answer

NAD T763 - i turned it on and all the lights on the display lit up and stay on. It doesn't work at all !! Any suggestions?


Have you tried doing a factory reset?

1. With unit powered ON, press the VIDEO and TONE DEFEAT buttons.
2. Display will show "AH RESET DONE".
3. Power off (from rear panel switch) and back on.

Jan 29, 2011 | NAD T763 Receiver

1 Answer

Hello. I get no sound out of my AVR 7000 Receiver. No cables behind has been touched in the past. I'm trying TEST TONE, and everything seems normal in the display, but still no sound. I use Preout a NAD...


You don't say if all speakers are silent or just the ones to the unspecified NAD power amp. Do ANY speakers work regardless of which device powers them? Could the NAD be the problem?

Dec 25, 2010 | Harman Kardon AVR 7000

2 Answers

I have a NAD 510 CD player with no display lighting working and would like to repair this myself, and also a NAD 710 receiver/amp that does not tune in any stations but otherwise works fine, would it do...


wont do any harm to open it up. look for blown fuses. i have a NAD amp and the desplay goes blank and sound distorts when there is a blown fuse inside, my amp has abourt 8 fuses inside it 4 per chanel

Jan 04, 2010 | NAD C521 CD Player

1 Answer

Nad c520 high pitched ringing


Hi, From your description, it sounds as if the noise is coming from the circuit that controls the display backlight. If I recall correctly, the C520 has an EL backlight just like the C521 (which I have one of). On the front of the circuit board, there should be a little yellow trimmer potentiometer that controls the brightness of the display. It may be that the noise will go away if the brightness is turned down some. If  the noise varies as you turn the controller, but doesn't go away completely, the backlight may need servicing.

Aug 06, 2008 | NAD C521 CD Player

4 Answers

NAD AV-716 receiver


I just tried turning off selective tone and it is now working.

Dec 01, 2007 | Audio Players & Recorders

3 Answers

NAD 502 CD player LCD problem


hey, well, typical problem i nad cd players, and also receivers by the way. The proble are tha nad use standard glow lamps. And as we know, the blow!! And often when you move around with the cd. Well i do have repair note for this one also. http://www.miguelovitch.dk/ go to the menu: 'amplifier repair notes' (yes includes cd players ;) ) Here you can find free amplifier repair notes, an go fore nad 705 repair fix (same fault with defect bulb's as in you nad cd) And also a technical repair movie showing you the hole process of the 'workaround' this fault i NAD 522 (NAD 501, 502, 512 and more) http://freemovies.s-educator.org/repair_movies/nad/nad_cdplayers_defect_lamp_in_display_stremingvideo.html best regards michael miguelovitch

Sep 06, 2007 | Audio Players & Recorders

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