Question about Sony DAV-C700 System

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Red power light, but no display or lighs

I have a red power light but no display or activity from the cd tray.?
Also a slight humming noise inside the device. Any solutions?

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  • Anonymous Nov 30, 2007

    same problem, light is on but nothing else happens either with the remote or manually pressing the buttons.

  • somar12 Feb 22, 2008

    same problem, from one day to another, working perfect one day, gone the next. I had (have) it for 5 years. If solution found write to [email protected] Thanks

  • Anonymous Apr 26, 2009

    I have the same problem. The red power light is on but can't get the unit to actually turn on or do anything.

  • benjamindall Apr 26, 2009

    I have the exact issue. If anyone knows a fix, please email me at [email protected].

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A lot of "aged" problems relate to the power supply with this type of unit. If you are a handy chap and know what capacitors are you will find that finding and replacing the "dry" caps in the power supply will fix most problems including streaky pix and crackly audio.

Posted on Mar 10, 2008

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Same issue here...

Posted on Dec 17, 2007

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6ya6ya
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Posted on Jan 02, 2017

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2 Answers

Peavey XR 122D powered mixer developing hum noise dispite pressing the noise filter. anything more to be worth doing?


Hello,

I need a bit more information but from what i can tell it's about the power supply capacitors issue, as this devices are known to develop such kind of humming annoying noise when they go under the specified value, let me know further,
Regards.

Jul 20, 2014 | Peavey XR 1220 Powered Mixer Mixer Powered

1 Answer

Humming noise


Possibly a bad cable or bad ground or bad outlet?. Easy solution, try a different outlet and see if the hum still exists. Also, make sure your speaker cables are NOT run parallel along with, or close to any power cables, Speaker wires can and will pick up AC "Humm" noise.

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I'm having two problems with this unit , a SONY CDP-CE375 5-CD Changer, which I bought several years ago. The first problem: Occasionally, the CD doesn't seem to be seated properly when I close the platter...


Granted, they don't actually SAY you should carefully place the discs into the detents designed for them on page 7, but that is the expectation.

http://www.retrevo.com/support/Sony-CDP-CE375-CD-Players-manual/id/423ci261/t/2/

As for audio hum,

Buzzing is usally AC line noise leaking into an un-shielded cable somewhere or a floating ground. If the AC plug is reversible, try that. Sometimes the buzz is from an attached device. Make sure all audio cables are plugged in tightly at each end and routed away from or at right angles to any power cords and away from other sources of strong magnetic fields like TV's. I've also seen variable track lights induce noise but it's usually minor.


Consider the presence of light dimmers, too. Mine induce buzz when the lights are on.

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I have the same exact problem with my Onkyo C-707CHX and I found a solution that doesn't involve jamming any screws or other metal objects into your cd tray (which could most likely just cause more damage). This way seems a little safer: Power on your device and hit the open button. As soon as you hit the open button quickly push slightly with both hands on both sides of the cd tray that should be opening. You should hear the trays moving around in there and then you have to try to feel for a slight push from the tray. As soon as you feel that slight push, take your hands off of the tray and let it come out. This has been working for me for a while now (and hopefully will continue to work until I take it to get fixed somewhere). The only issue I have run into is that my "Disc 1" open button doesn't work with this method. So I just use this method with disc 2 or 3 and then once it's open I can hit the disc 1 button to get to that tray. So if it doesn't work with one tray, try the other two as well. Hope this helps.

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1 Answer

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hello poopig1, after further review, I meant to describe this: look for a pinhole in the area of the CD tray to insert a pin...similar to the same pinhole you see on a PC's cd player to eject the tray manually. If there is none, then try this: Open the cover and find the motor that, when turning, performs the tray ejection. Then, turn that motor by hand until the entire tray (or cartridge) is ejected. Then power up and observe the events.

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