Question about Dell Latitude D530 Notebook

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No power LED

I work as a tech for a company that buys various brands of laptops, ruggedizes them, then resells them to a 3rd party. Anyway, on some units,during reassembly, the power LED doesn't work. Sometimes they get broken/damaged in the process, so we have replacement LEDs that are installed (with correct polarity). So I've had it replaced twice, in case the first LED was bad, but still no dice. I've done a pretty decent visual of the area, which is about all that i can do without schematics. Any ideas?

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  • mdmcclain777 Mar 10, 2009

    no there is no voltage on the power LED. But if I turn on the CAPS LOCK LED there is approx 1.9vdc

  • mdmcclain777 Mar 11, 2009

    thanks for the help, cheap to fix. yes, i know that the caplock led is part of a different circuit. as far as taking the time to fix leds, we HAVE to, otherwise the customer won't accept the product. anyway, i found the solution: there is a driver IC right beside the power, hard drive, and batt leds. it had a cold solder joint on it. we have some very skillful reworkers at the factory, so touching up the solder was a piece of cake. i wish i could be more specific about the type of driver IC that it is, just no schematics and very limited time for research. thanks to everybody in this comunity.



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Did you test if there's any voltage?

Posted on Mar 10, 2009

  • lotfi bouakaz
    lotfi bouakaz Mar 10, 2009

    well if there isnt voltage means the board isnt shipping any that's a far more complicated issue, the caplock light is related to the keyboard and LEDs on the side or elsewhere take power from the board the keyboard takes power from the keyboard connector.

    I dont think you should waste time fixing leds as long as the laptop powers on and works thats what matters. + you gona need air soldering tools for that type of repair.

    hence i am the only one helping, would you rate please?


  • lotfi bouakaz
    lotfi bouakaz Mar 11, 2009

    thats good! but consider "hot air soldering" its amazing, super fast, super easy and super hot you just have to purchase in addition "small nozzles" so the air wont effect the other chips around. use it to remove dc sockets, bios chips, capacitors resistors you name it. this hot air soldering changed my life man so much better

    they start from $150 to $250


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