Question about Sony BRAVIA KDL-40S2000 40 in. LCD HDTV

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Sony kdl-40s4100 no red standby light.When power button pushed green power lamps lights but no picture ,screen,audio.All power is good 15 volt 12 volt 5 volt 3.3 volt 1.8 volt.Also all crystals oscillate. Thanks,Alex.

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  • 3 more comments 
  • alex977 Nov 02, 2010

    Yes it does.

    Alex

  • alex977 Nov 02, 2010

    I dont have one.

  • alex977 Nov 02, 2010

    I have printed the schematic.

    Alex.

  • alex977 Nov 02, 2010

    The -5 volts is pulled down or bad at u1101.I will track it down from here.

    Thanks for the schematic Alex.

  • alex977 Nov 02, 2010

    Yes, the -5 volt power supply was bad or pulled down at u1101 pin 2 or c1125 c1127.
    Thanks,Alex.

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Does it make a click sound when powered on?

Posted on Nov 02, 2010

  • 3 more comments 
  • eagle338
    eagle338 Nov 02, 2010

    IN that case its not the power supply. Your problem is more likely to be the mainboard. Can you send the service manual across so that I can give you some pointers as to where to begin.

  • eagle338
    eagle338 Nov 02, 2010

    Ok. No problem. I found one in my collection. I will upload it and send it to you. And then I will tell you what else to check. Give me 5 min.

  • eagle338
    eagle338 Nov 02, 2010

    Here you go
    http://www.mediafire.com/?0150m0vktwzz0y...
    Let me know once you have downloaded it so that we can begin.

  • eagle338
    eagle338 Nov 02, 2010

    First up lets confirm that its not the power. Start by checking for the 6.5Vat the start of the circuit on the power board(page-25). Also look for 3,3 V at the location 3.3V_SB. Also look for 15V near C1150, 6.5V near C1151, 3.3V near 1149, 12V near 1152. Also look for faulty capacitors in the circuit after the junctions specified(blown, bulged or cracked caps). Check other circuits for continuity like 5V_ALPS etc., and verify if everything is as it should be. If it is then let me know and we will move on to the next one.

  • eagle338
    eagle338 Nov 02, 2010

    Sure thing. You are welcome. Thanks for using Fixya!

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