Question about Sony KDL40EX500 40 in. HD-Ready TV

1 Answer

Sony KDL40EX500 power supply. Board has standby power but other voltages don't come up. Tried shorting "Power On" pin (pin 13) to "STDBY3.3V (pin 15) to try and get the board to power up but nothing.

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  • Coen Willemse
    Coen Willemse Oct 12, 2013

    Oh - sorry, I should mention the fact that if everything is assembled and tv plugged in, the standby LED (Red) lights. When the tv is switched on, the "TV ON" light turns on (i.e. green LED). No other voltages present on the PSU board however.

  • Coen Willemse
    Coen Willemse Oct 12, 2013

    Any help would be greatly appreciated! :)

  • Coen Willemse
    Coen Willemse Oct 12, 2013

    Hi - thanks for your help!Have been through the PSU with a fine tooth comb, checked all the MOSFETS, rectifier, diodes etc which all look fine. I was mixed up about the "Power Good" line though - apparently this is the PSU's signal to the connected boards that voltages are stable and they're "good to go". Anyway, thinking of replacing the caps next as the main primary power cap seems to have a slight bulge coming out of the top...

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  • 19 Answers

If You do not see any open link or resistor, short IC or transistor on power supply it must be a control board problem. You must get the set to SONY, as it is necessary to exchange board and upgrade software.

Posted on Oct 12, 2013

Testimonial: "Opps - this was supposed to go down here... Hi - firstly, thanks for your help! Have been through the PSU with a fine tooth comb, checked all the MOSFETS, rectifier, diodes etc which all look fine. I was mixed up about the "Power Good" line though - apparently this is the PSU's signal to the connected boards that voltages are stable and they're "good to go". Anyway, thinking of replacing the caps next as the main primary power cap seems to have a slight bulge coming out of the top... And if that doesn't fix it, you're probably right - it could be the control board... Which would be a real bummer...."

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Posted on Jan 02, 2017

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SOURCE: sony PFM-42B1E plazma screen

Does the red standby light flash ?? If so count the flashes and see my error code section.

Posted on Aug 25, 2008

  • 12 Answers

SOURCE: My Sony KDL-32M3000 has dark

It will be either BM board (Video Processor board) or Tcon Board (top side of panel). I have similar problem...my TV turns on, lamps turns on (you can see them from back side panel holes) but just a dark blue picture appears with no image (like picture when external input is selected without signal), no OSD appears....some times I can heard audio (using Antena).
I'm thinking getting the BM board.

Posted on Jan 10, 2011

alpug
  • 1961 Answers

SOURCE: I have a 2007 32" Sony Bravia KLV_32U300A with an

sometimes defective capacitors are not noticeable visually unless we use an capacitance tester/instrument .better replace the capacitors at the secondary of the transformer and resolder the pc board .check also the connectors make sure that it fits the socket tight..good luck

let me hear if you have further question..

Posted on Feb 07, 2011

  • 8909 Answers

SOURCE: Sony Bravia KDL-40S3000...standby red light blinks

There may be no horizontal ouput, Check C515 & 516 and the jungle IC, IC206.

Hope that helps

Posted on Feb 28, 2011

  • 17 Answers

SOURCE: Sony Bravia LCD KLV-32U300A Symptoms: ~ powering

I know its a 32 inch TVand its probably about 2 years old, give or take. If you got a warranty on it, I suggest calling whoever you got it from (BestBuy,Amazon, etc) and seeing what they can do for you to get it fixed for free. Otherwise call Sony abotu getting a real tech out to either fix or swap parts on the TV at your house, or where to send it for repair. Depending on what it costs, you are probably better off buying a new 32inch LCD TV for about $400.

It seems you have isolated it down to the power supply though. If you are confident enough, you can get a replacement on ebay for abotu $100.

Just depends on what you value more: time or money.

Posted on May 21, 2011

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[JP-25]

1 2 3 4 5 6 7 8 9
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16] ACPI Led (-)
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