Question about Sony DAV-S400 System

2 Answers

Sony dav s400 protect sign?- HELP!

System just will not start now all i get is this protect sign in the window. My system will not do any thing, if it does start then any noise from the tvor speakers we just get this protect single Help

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  • george1971 Nov 20, 2007

    hi, all i get on the front of the panel was at first it said "HPTheatre" and now all i get is the "protect" sign and nothing will happen it is as if it has locked

  • Anonymous Apr 06, 2008

    aksecly the same problem! The "protect" sign!!
    i have opent it and i don't see a white cabel, on my right hand!
    I hurt a story off someone that he fix'it it with a hot tin shizzel!
    is that trouh? i ralley need some help!

  • Anonymous Apr 15, 2008

    I have the same problem but don't really want to be taking the thing apart? Any other suggestions apart from an out of warranty repair job? Also I notice that there are not many authorised Sony repair shops around...

  • dannymow Apr 29, 2008

    me too



2 Answers

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open the system and remove the cables (white cable) that are installed on the panel at the right hand-side.Replace the dettach cables after 10minutes,couple the system back and insert your cd.
i am sure it will work fine.

nb: the white cables are about 5cables at different location on the panel.

Posted on Oct 29, 2007

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  • 408 Answers

Hi, you have to unplug your unit and open it up you will see two printed circuit boards one slightly over the other at the back of the unit. You have to loosen the top one off so that you can get to the bottom one, turn the bottom over and take the protective copper board off wth care so that you can see the soldered joints. Check all large pole joints and re-solder as i had to do 14 joints also the brown capacitor was loose on my board and re-soldered that also. I found that the cable inside the unit that comes from the headphone socket,follow it to where it is connected to the bottom board, three of the soldered joint were loose and i re-soldered them also. Rebuild circuit boards into place dont forget to put the copper cover board back in place on the bottom circuit board. The above info i found on an internet site and followed the instructions my unit now works just as new. P.S. USE SMALL TIPPED SOLDERING IRON.

Posted on Apr 24, 2008


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Posted on Jan 02, 2017

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The protect message indicates that a problem was found in the output stage of the amplifier. Unless this gets repaired, nothing will work. As a verification that the speakers or the wires are not the problem, unplug all of the speakers and try again. If protect still is displayed, the problem is inside the unit.

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