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No sound and red power light on NAD C372

I haven't talked to my dealer or NAD yet about this problem, but I wanted to check if anyone has had a similar issue with their NAD or could identify what's wrong. I usually leave the C372 powered up and on standby, but after powering down and unplugging the unit for a couple of days when I wasn't around, I powered it up again to find that it provides no sound from any source, into speakers or headphones. The power light glows its warning red, but I've checked all of the potential issues in the manual (speaker cable shorts, overheating, speakers selected, tape monitor not selected, etc.) and all of that's been OK. I powered it down, disconnected, checked, and reconnected everything, powered it up again and still the same thing. I've done this numerous times, tried different sources, and so forth. This happened once before, a few weeks ago, but when I powered down and up again it was fine. Any suggestions?

The amp is only a month old, and I'm using it with Vandersteen 2ce Signature IIs and Sennheiser HD 600s, with a Marantz changer, Playstation 1, and Technics TT as sources. Cabling is Tributaries and Monster. I've been very pleased with the amp and with my system's sound as a whole, and I've also owned other NAD integrateds (302, C325BEE) in the past without incident. Thanks for any input!
ablang
xti16
1,525 posts
 
I'm not familiar with NAD but from your symptoms I would guess a problem with the power supply. You may have lost a voltage. Have you tried disconnecting EVERYTHING and powering it on with the volume all the way down? Does it come up normal? If not it should be under warranty. Remember manufacturers do not design and manufacture all componets and any 1 part is prone to failure. Its really not a question of if will ever break but when. Working with electronics for over 30 years I can say most failures occur within 90 days with new equiptment. IF it goes beyond that I personally feel pretty confident. Its a bummer that its new and it has a problem. I know because I bought a new Meridian G08 that had an intermitten transport/drive.
valinar
472 posts
 
My c320bee did the same thing. Push one by the source selection buttons such as cd.
kd938
9 posts
 
Similar problem. Also able to resolve by checking source buttons.
ablang OP
165 posts
 
Thanks for the responses. I have tried each of my sources, so the source selection isn't the issue, and I've disconnected and reconnected everything and powered up again a couple of times. It comes up just the same: speaker and source selections show as normal, but the power LED is red. I even opened it up last night to check the fuse, and it looked fine.

I'm guessing you're right, Xti16, that it's a power supply issue of some sort. My last concern is that I powered the whole system up via my APC H10 power conditioner (switches for all gear were on, with the conditioner as a master switch). Is it possible that the conditioner overloaded the amp with a surge? The APC supposed to keep the voltage constant, so it would surprise me--and also I've never had this problem with other amps, powering up the same way. Any further input much appreciated. Thanks.
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