Question about LG Flatron L1510M 15" LCD Monitor

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Hi I have an LG1510M monitor, I turn it on and after a few seconds it goes dark... yes it doesn´t turn off only the lamps go off, can somebody give some support, I already dismount the cards but there is no evident damage on...

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  • atovar_2000 Aug 06, 2010

    Thank a lot, I will start to do this tomorrow morning and I will keep you informed.
    By the way: I already cheked all the capacitors and they look very well and there are no signs of burns or heating on the power card.

  • atovar_2000 Aug 06, 2010

    Hi, again, please were can I purchase the replacement for the lamps? I tryed on internet but unsucessfully, please if you know let me know.
    Thanks a lot in advance!!!

  • atovar_2000 Aug 07, 2010

    Hello! Good morning: I started with some tests due that there is no visible damage to the components, I disconnect the control board from the power-inverter board and energize it, obviously there is no response...blank,but after that I reconnected the control board and tested again, surprise!!! now the panel works and I am testing it until I can be sure that it is fixed, I remembered that comment about the "Driver IC cuts the curent" probably there was something that causes that the panel comes to be "protected" and needs to be "reset", it working now but I have it under test..... Thanks again and I will keep you informed, have a nice day!

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Check the capacitors on the power/inverter PCB. They have to be flat on top, not swollen. If in doubt replace them.
One or more of the light bulbs are blown. The circuit checks the current and when it's missing, the driver IC cuts the power to prevent more damage.
Connect the bulbs one by one and turn on to see when the screen will not illuminate for that few seconds to determine the broken one. Replacing a bulb is hard because the opening of the LCD and leads to image defects because the dust in the air.
It's a good idea to connect the feedback from a working bulb to the broken one and thus cheat the electronic.

Posted on Aug 05, 2010

Testimonial: "Very helpful information, totomitak seems to me that really know what we are talking about (technically)...Thanks again Now I have to get new lamps!"

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  • Dimitar Todorov Aug 06, 2010

    Extract the lamp and measure its lenght. Then just look for "backlight CCFL bulb LCD TFT XXXmm" on ebay. (replace XXX with the lenght in milimeters)

  • atovar_2000 Aug 06, 2010

    Thanks a lot, all the lamps seems to be weared (the end look gray-black instead of white), they turn on (all 4) but I will try changing them for new ones, if the failure persist... I will be online again! thanks

  • Dimitar Todorov Aug 07, 2010

    If weared the lamps will glow pink. Before changing them try to measure the transistors of the inverter. Some of them may be faulty. If there are ceramic capacitors between transistors, replace them.

  • atovar_2000 Aug 07, 2010

    Hello! Good morning: I started with some tests due that there is no visible damage to the components, I disconnect the control board from the power-inverter board and energize it, obviously there is no response...blank, but after that I reconnected the control board and tested again, surprise!!! now the panel works and I am testing it until I can be sure that it is fixed, I remembered that comment about the "Driver IC cuts the curent" probably there was something that causes that the panel comes to be "protected" and needs to be "reset", it working now but I have it under test..... Thanks again and I will keep you informed, have a nice day!

  • atovar_2000 Aug 07, 2010

    Hello! Good morning: I started with some tests due that there is no visible damage to the components, I disconnect the control board from the power-inverter board and energize it, obviously there is no response...blank, but after that I reconnected the control board and tested again, surprise!!! now the panel works and I am testing it until I can be sure that it is fixed, I remembered that comment about the "Driver IC cuts the curent" probably there was something that causes that the panel comes to be "protected" and needs to be "reset", it working now but I have it under test..... Thanks again and I will keep you informed, have a nice day!

  • atovar_2000 Aug 07, 2010

    Hello! Good morning: I started with some tests due that there is no visible damage to the components, I disconnect the control board from the power-inverter board and energize it, obviously there is no response...blank, but after that I reconnected the control board and tested again, surprise!!! now the panel works and I am testing it until I can be sure that it is fixed, I remembered that comment about the "Driver IC cuts the curent" probably there was something that causes that the panel comes to be "protected" and needs to be "reset", it working now but I have it under test..... Thanks again and I will keep you informed, have a nice day!

  • atovar_2000 Aug 07, 2010

    Hello! Good morning: I started with some tests due that there is no visible damage to the components, I disconnect the control board from the power-inverter board and energize it, obviously there is no response...blank,

  • Dimitar Todorov Aug 07, 2010

    I think at the end the capacitors are faulty. They may look very well and be dry inside in that time. Replace them. Electronics always suffer of not well flatten voltage because the faulty capacitors and perform unpredictable.

  • atovar_2000 Aug 07, 2010

    Thanks by the moment the monitor is working well (4:30 hrs under continuous testing), I´m also considering to change them anyway, just to assure the repair.

    Thanks a lot

    By the way: do you know where to get the replacement for an LCD screen of an aquos tv 15"?

  • Dimitar Todorov Aug 08, 2010

    Find the part number at the back of the LCD and look for it on ebay.

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