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My Sherwood RD6405 Switches on for about 5 seconds from standby when you choose an input source but then goes back to standby. It has only had about 12 hours use in total.

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  • moo123 Apr 14, 2008

    Having the same problem; switched it off over night,but it still wont start up past standby.

    We dont have it covered by warranty.

    Any assistance would be much appreciated.

  • faeiries Dec 28, 2008

    Recently bought a logitech harmony universal remote. Everything was working fine but now my Sherwood rd-6405 wont. It turns on for about 5 seconds & then switches off. All my old remotes still work but the sherwood, I can't turn it on manually either. Can anyone help me??

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  • 1,512 Answers

Hi hyphen

Try a hard reset first. switch the amp off overnight and try it in the morning. If problems persist, is it covered with warranty from where you bought it? Best to go that route if it is. If not, get back to me here.

regards
Graeme

Posted on Mar 19, 2008

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Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on; or it may turn on but produce no audio to the speakers.

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 'nekkid'. 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.

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Cables between sources and compatible units rarely need to be physically modified.

Register and download the manuals for free at retrevo.com

http://www.retrevo.com/support/Sherwood-RX-5502-Receivers-manual/id/3124dj384/t/2/

http://www.retrevo.com/support/Atlantic-Technology-212-SB-Subwoofers-manual/id/866dj197/t/2/

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My $.02... If subwoofer power is all you need, why not just get a nice Carver 2-channel amp on eBay (2x100w would suffice), bridge it to 200 watts and blow the house up, figuratively? Then you could redeploy or sell the unused receiver.

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