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    #1

    Dell LA-F115P

    Hey guys, how are you?
    I am having a problem with a Dell Notebook (Mother Compal LA-F115P)

    The problem is the following: When I connect an original charger, the equipment turns on, but not the display. If the machine is off with the battery connected and plugged into the charger, the charger charges the battery (Therefore it is not a PSID problem (I even have data transfer)).
    If I start on battery, the computer boots normally. And here's the weird thing, if I connect a power supply or a generic charger, the machine turns on, shows a display and obviously I get generic charger alerts. The last test I did is power up on battery and plug in the original charger and the machine freezes.

    Does anyone have any idea what could be the cause? The equipment came with a changed BIOS, I downloaded it from the official page and updated it with the programmer

    Note: The charger works, because with other Dells, they work perfectly for me
    Last edited by RickyGrizutti; 03-30-2023, 06:54 PM. Reason: Note
    Tags: None
    #2
    Re: Dell LA-F115P

    Originally posted by RickyGrizutti View Post
    Hey guys, how are you?
    I am having a problem with a Dell Notebook (Mother Compal LA-F115P)

    The problem is the following: When I connect an original charger, the equipment turns on, but not the display. If the machine is off with the battery connected and plugged into the charger, the charger charges the battery (Therefore it is not a PSID problem (I even have data transfer)).
    If I start on battery, the computer boots normally. And here's the weird thing, if I connect a power supply or a generic charger, the machine turns on, shows a display and obviously I get generic charger alerts. The last test I did is power up on battery and plug in the original charger and the machine freezes.

    Does anyone have any idea what could be the cause? The equipment came with a changed BIOS, I downloaded it from the official page and updated it with the programmer

    Note: The charger works, because with other Dells, they work perfectly for me
    hi mate good day , ill help you lets focus on the charger ic test all voltage f the charger ic .

    Tip always put schecmatic
    Attached Files

    Comment

      #3
      Re: Dell LA-F115P

      Hello, thanks for answering! I didn't understand. Do you want measurements to know the measurements of the CHARGER (PUB01)? If so, which pins do you want to know?

      Comment

        #4
        Re: Dell LA-F115P

        What is the voltage to ground of the PSID at the dcin connector?

        Comment

          #5
          Re: Dell LA-F115P

          Originally posted by mon2 View Post
          What is the voltage to ground of the PSID at the dcin connector?
          I couldn't tell you exactly right now since I'm not in the workshop. But what is that question about? I clarified that the PSID is not only in 3V on both sides (jack and EC), but by measuring with an oscilloscope I have data transfer, what is necessary for the EC to know that it is an original charger that is connected.

          Comment

            #6
            Re: Dell LA-F115P

            What is the power rating of the original charger that is failing?

            What is the power rating of the generic adapter that works?

            There are numerous public articles on the operation of the single wire communication for the PSID line and with use of emulators to allow for home brew adapters.

            Comment

              #7
              Re: Dell LA-F115P

              Originally posted by mon2 View Post
              What is the power rating of the original charger that is failing?

              What is the power rating of the generic adapter that works?

              There are numerous public articles on the operation of the single wire communication for the PSID line and with use of emulators to allow for home brew adapters.
              The original charger is 65 watts.
              The alternative charger also 65 watts
              And I have a 30v 5 amp adjustable source

              Comment

                #8
                Re: Dell LA-F115P

                Originally posted by RickyGrizutti View Post
                The original charger is 65 watts.
                The alternative charger also 65 watts
                And I have a 30v 5 amp adjustable source
                better use yoour original charger

                Comment

                  #9
                  Re: Dell LA-F115P

                  Originally posted by kalilinux25 View Post
                  better use yoour original charger
                  I'm using the original charger

                  Comment

                    #10
                    Re: Dell LA-F115P

                    To learn about the PSID interface details:

                    https://www.mikrocontroller.net/topic/186476

                    Comment

                      #11
                      Re: Dell LA-F115P

                      Originally posted by mon2 View Post
                      To learn about the PSID interface details:

                      https://www.mikrocontroller.net/topic/186476
                      Perhaps I'm not explaining myself well. I have an original charger (which works and has the same watts as the device uses) (I tested it on other Dells) that when I connect it to the device, the machine turns on, but there's no image, even though I have one-wire communication (measured with an oscilloscope). On the other hand, when I connect a regulated power supply or a generic charger, the machine turns on, displays an image, but obviously doesn't charge the battery and runs slowly. The question is, what could be happening that with an original charger working, the device doesn't display an image

                      Comment

                        #12
                        Re: Dell LA-F115P

                        Read your post #5

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