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I have an older model of Sony receiver STR-V333ES. I didn't use it for couple of years and now after i tried to pair it with my Sony super audio CD player I am getting a message on the front pannel "PROTECTOR PLEASE POWER OFF". I can't get any sound from the speakers, so it sound like power output issue? I couldn't find anything in the manual dealing with above mentioned message. It is something with the menu set up or amplifier problem? Tom

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This is an amplifier problem. Most likely an internal component has failed, it displays this message so no further damage is done. I would recommend finding a local audio electronic repair professional and get an estimate on repair. Just keep in mind you can find a comparable/upgraded receiver from sony for about 200-300$. So don't spend to much on repair, as you could still sell yours for parts/repair.
Thank you,
Lee

Posted on Sep 16, 2010

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Turn it OFF. Look for shorted speaker wires or shorted speakers.

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http://www.retrevo.com/support/Sony-STR-DE335-Receivers-manual/id/387bh942/t/2/

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Follow the steps below to troubleshoot if the word PROTECT or PROTECTOR is flashing on the A/V receivers display.
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  2. Reduce the volume level. IMPORTANT: If the receiver is played back at maximum volume level it may enter the protect mode. Maximum volume listening will cause the receiver to run very hot and may drain the output capacitors.
  3. Disable the surround sound option if both the A and B speakers are being used simultaneously.
  4. Ensure the top of the receiver has proper ventilation to keep it from overheating.
  5. If the message only occurs when using a DVD player, the sampling frequency may be set too high. IMPORTANT: Some receivers provide compatibility with the higher sampling frequencies through alternate connections. Consult the owners manual for specific information.
  6. Unplug the AC power cord for about 1 to 2 hours to reset the output transformers.
If the issue is still unresolved, service may be required. The Sony® eService Web site at http://eservice.sony.com/ can assist you in obtaining service from a Sony Service Center or locating a Sony Authorized Servicer.

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