Dell 2007FPb No Power, Power and 1 icon (VGA) blinking

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  • tboxxx
    Member
    • Feb 2011
    • 21

    #41
    Re: Dell 2007FPb No Power, Power and 1 icon (VGA) blinking

    Another one is TEK DMM850, but it did not help a lot.
    The readings are not stable and not even close to a nominal.

    Comment

    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271

      #42
      Re: Dell 2007FPb No Power, Power and 1 icon (VGA) blinking

      Okay, let's see if I put these puzzle together properly?

      1) On pin 3 of J033, see if there is continuity to each negative part of FD 7/8 (the white stripe).

      That is, put your multimeter on ohms. See if the ohms measurement is less than 1.0 ohms from pin 3 (yellow) of the voltage regulator to each diode (yellow again).

      2) If yes, then I suspect the diodes could be bad. You will have to desolder both FD 7/8 and retest them out of circuit. If they test good, then I suspect the voltage regulator could be bad.
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      Comment

      • tboxxx
        Member
        • Feb 2011
        • 21

        #43
        Re: Dell 2007FPb No Power, Power and 1 icon (VGA) blinking

        I am reading 0.1 ohms with TEK and Meterman. Meterman beeps on continuity test.
        I will desolder both FD and check those.

        Comment

        • chad720
          Member
          • Jan 2011
          • 16

          #44
          Re: Dell 2007FPb No Power, Power and 1 icon (VGA) blinking

          Hi there, I had the exact same simptoms as tboxxx, so I donยดt think if I should open a new post. No response of the panel buttons, vga keeps blinking and only 19V on the conectors.

          1) I had found on the USB board a J598 voltage regulator faulty (in short) as the s4 64A diodes that corresponds to this part of the circuit. Also the 3A fuse was blown and the zener ZD701 was shorted (thanks to billy66 that has made a good effort to discover for me the breackdown voltage).

          2) I replaced everything, but the vga card has also a short, that I cannot isolate. Iยดve removed all the caps that was on the shorted trail, hoping one was shorted but with no luck, if tboxxx allow me to use his pictures,

          In red are the shorts (except the 3A fuse that was open). On the vga, afther replacing the big 950T (1,8V 1A regulator) I realiced the regulator wasnยดt shorted. The other fet of the circuit wasnยดt shorted either. (if someone knows a replacement just in case the nยบ is T044 / 950t65 the slash means new line)
          On blue are something remarkable about what seems to be an eprom, that has 4 pins for ground (not corresponding to datasheet).
          thatยดs all for now, if someone could please tell me what can I test, as I havent found datasheet for the FLI5961 nor the TW9606, and Iยดm running out of hopes here.
          More to tell is that not a single zener of the vga card was shorted (on both ways), and the 5 pin stuff on the back of the vga says 69789 or 697B9 (canยดt find datasheet or replacement but I think the short shouldnยดt be there as both pads are linked with a cap that I removed and was ok).
          Thanks for reading and any advice would be really apreciated!
          Chad

          PW: to tboxxx: your board seems to have a white residue, make me wonder if it has get wet or something.
          Attached Files

          Comment

          • a69
            New Member
            • May 2011
            • 1

            #45
            Re: Dell 2007FPb No Power, Power and 1 icon (VGA) blinking

            Hi all.
            Need a circuit on the monitor DELL 2007

            Comment

            • Badgen
              New Member
              • May 2011
              • 1

              #46
              Re: Dell 2007FPb No Power, Power and 1 icon (VGA) blinking

              Hello everyone.
              I need to know breackdown voltage of ZD701.
              Can anyone help me, thanks

              Comment

              • dnyaj
                New Member
                • Jan 2013
                • 1
                • USA

                #47
                Re: Dell 2007FPb No Power, Power and 1 icon (VGA) blinking

                Can anyone help me? I pickup a dell 2007FPb and the problem is that the LCD wont stay on. It keep on shutting off and turn itself back on without me hitting the power button. Sometime it stay on for a few minutes. I had re-solder the connection for the power and all the caps but still won't stay on. Let me know if anyone have a solution or what to test.

                Comment

                • kasatmata
                  Member
                  • Sep 2012
                  • 18
                  • Indonesia

                  #48
                  Re: Dell 2007FPb No Power, Power and 1 icon (VGA) blinking

                  thanks

                  Comment

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