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LCD turns on then off right away. I hear what sounds like a short

The monitor is a maxstar A170E1-T5.
I took it apart and when i plug it in i see a little spark on one of the copper blocks. I do not know what they are, but it has "F190 X453" on the black casing.

I would like to try and fix this myself, as i'm interested in soldering and electronics.

Any info would be appreciated.

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  • mjoc13 Oct 18, 2008

    sorry for the poor description.

    here is a picture of the board. I circled the unit and location i see the spark


  • mjoc13 Oct 19, 2008



  • mjoc13 Oct 19, 2008

    Well I can't explain what happend.

    I unplugged the upper blub plugs and turned it on...a "feezing" sound came out of it, but it stayed on longer. Then i plugged them back in and unplugged the lower blub plugs and it "feezed" but smelled like static (best way it explain it). Then i plugged them both in and turned it on and it worked!

    no sound, no smell, and i have picture.

    Again i have no idea what happened, but thank you for suggesting to remove the plugs. I'm new to all this, but would like to learn all about it. I have 3 mobo with leaky and swallen caps that one day i might fix. :)

    Thanks again!

  • Fran Bednar
    Fran Bednar May 11, 2010

    I can't get this link to show up as a valid URL address

    You can insert a picture right here too

  • Fran Bednar
    Fran Bednar May 11, 2010

    Can you post or send a picture of sparky ?



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Now that's better.
That is the backlight transformer that is on the inverter board.
Sparks Showing in that small oval indicate a broken winding inside there that is usually not fixable based on where you have it located.
The two mosfet transitors to the right of the larger oval (small square black components with 8 contacts ) may have suffered damage as a result of the shorting in the transformer.
Now the tricky part is trying to locate one. Can you read the numbers ?
Try swapping the two upper light plugs with the two lower ones to see if there is any change. May just have a bulb shorting out ?

Posted on Oct 19, 2008

  • Fran Bednar
    Fran Bednar Oct 19, 2008

    Good to hear.

    Might have been a bad contact on a bulb. Check them over good and
    the wire ends before fully reassembling it. Wiggle them aroung while
    they are on.

    Take a look at the nearby solder joints for a possible weak one that may have refused itself.

    The sound that came from it may have been something finally burning off ?

    Caps may help the motherboards ??

    Don't forget to post a rating !!

    Shout if ever you need something else.

    I'm on ebay too




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