Question about Sony STR-DE845 Receiver

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Hello! I just hooked this receiver up after some time sitting in the closet and it works for less than a minute and then the sound switches to the TV and PROTECTOR flashes across the Reciever screen? I checked my wiring and it all appears to be hooked up properly. The only difference I can see since the last time I had it hooked up is I have an HDMI cable coming out of the receiver to the TV but I have the fiber optics cable running from the Blu-Ray player to the receiver

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  • cinematichd Jan 30, 2010

    I think I have it working now. One thing still puzzles me though. The blue light for the receiver letting you know it is a 5.1 surround sound is not lighting up when I am playing the Blu-Ray player? I'd love to get this set up so the blue light was "ON" on the receiver so I knew I had Dolby Digital 5.1 Surround.

    The apparent fix could have been a number of things but here is what I did.

    1: I went to each speaker and shortened the exposed wires to 1/2" and made sure they were all inserted proper and not touching.

    2: I did the same thing for the speaker wires at the receiver end.

    3: I reversed the RCA connectors where they plug into the receiver just in case I had them plugged in to the wrong polarity.

    4: I went into the TV menu and shut the audio off on the TV so all the sound must come through the receiver now.

    I am thinking that because I had the Blu-Ray player hooked to the TV with a HDMI cable (for video) and then had a Optical cable running from the Blu-Ray player to the receiver for the audio signal that something was going one with that.

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  • Sony Master
  • 1,114 Answers

The most common problem found on FixYa for Audio Video Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

Posted on Jan 30, 2010

  • Frank Fulton
    Frank Fulton Jan 30, 2010

    Just make sure that you have the "Audio Input" selection set to "Digital" There is either a button on the front of the receiver or a menu setting in the "Setup Menu" for audio input "auto/digital/analog". When there is a "Digital" signal being sent digital will be played. Look at a DVD case and look for the audio section as to how it was recorded, then play it. Check for the "Digital" light. You should be fine. Hope this helps.

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