Dell N5110 (48.4IE01.021) DEAD

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • orientalsniper
    Badcaps Veteran
    • Apr 2013
    • 459
    • USA
    #1

    Dell N5110 (48.4IE01.021) DEAD

    Hello all, I've just received this laptop, I already reflashed BIOS, pins 1 and 8 don't have 3.3V.

    So I was checking the powerup sequence in the schematics (attached) and I have the following readings in PQ4001:

    Pin1: 0v
    Pin2: 3.3V (PWR_CHG_ACOK)
    Pin3: 19.50V
    Pin4-6: 0V

    Are those readings ok?
    Attached Files
    Tags: None
    • orientalsniper
      Badcaps Veteran
      • Apr 2013
      • 459
      • USA
      #2
      Re: Dell N5110 (48.4IE01.021) DEAD

      Update:

      Readings in RT8223:
      VIN: 19.50
      PGOOD: 3.3V
      LL1: 5V
      LL2: 3.3
      VREG5: 5V
      VREG3: 3.3V

      I'm going to be needing help on what values should I be getting from the KBC.
      Attached Files

        Comment

        • orientalsniper
          Badcaps Veteran
          • Apr 2013
          • 459
          • USA
          #3
          Re: Dell N5110 (48.4IE01.021) DEAD

          Also, what reading should I have in ACOK of battery charger (PU4001)? It's a BQ07A and not a BQ24745 according to schematic.

            Comment

            • orientalsniper
              Badcaps Veteran
              • Apr 2013
              • 459
              • USA
              #4
              Re: Dell N5110 (48.4IE01.021) DEAD

              Another update:

              Pins: 3, 14 and 15 of BQ07A are shorted against ground.

              EDIT:
              Disregard that, had adapter plugged.
              Attached Files
              Last edited by orientalsniper; 04-09-2014, 05:58 PM.

                Comment

                • jeremykum
                  Senior Member
                  • Feb 2012
                  • 95
                  • Malaysia
                  #5
                  Re: Dell N5110 (48.4IE01.021) DEAD

                  I do not know if this helps, I had experienced on many Acer that doesn't start up above 0.7A the culprit is the Intel PCH.

                  Also compaq that the standby LED doesn't lit up, also a failed Intel PCH.

                  I do remember I read somewhere that the PCH also affects the standby and a failed PCH chip can cause the board not booting at all or not booting fully.

                  For now, seems like you have 3.3V and 5V properly supplied. So I assumed that the power on button also has 3.3V supplied, and pulled to ground when button is depressed.

                  Try check Page 45 TPS51218 for 1D05V_VTT supply to PCH. Maybe some shortage that prevents that startup.
                  Mainly repair laptops, sometimes LCD/LED monitors. Also accepts changing/reballing/reflow BGA job request.

                    Comment

                    • orientalsniper
                      Badcaps Veteran
                      • Apr 2013
                      • 459
                      • USA
                      #6
                      Re: Dell N5110 (48.4IE01.021) DEAD

                      Sorry for lack of reply, was working on other laptops. All the pins TPS51218 are not shorted against ground.

                      There were 2 things that happened though:

                      1) PU4103 (TPS51123) was getting very hot, so I swapped it with a TPS51125.

                      2) The original BIOS chip was failing and I swapped it with another one. It was working for a few reboots, then it stopped working altogether and BIOS was corrupted, so I reflashed, rinse and repeat until replacement BIOS chip was failing too.

                      I don't know what is causing the BIOS chips to fail, any ideas?

                        Comment

                        • orientalsniper
                          Badcaps Veteran
                          • Apr 2013
                          • 459
                          • USA
                          #7
                          Re: Dell N5110 (48.4IE01.021) DEAD

                          I'm getting 2.4V in Pin18 (ENC) of power IC (TPS51125), that's not good right?

                            Comment

                            • Roshni16
                              New Member
                              • May 2020
                              • 2
                              • India
                              #8
                              Re: Dell N5110 (48.4IE01.021) DEAD

                              I Can't able to understand the "PWR_CHG_ACOK" meaning and how much voltage available at that point in Dell Inspiron 14z - 5423 model. and how to create voltage at this point.
                              Charging Ic : BQ24727

                                Comment

                                Previous template Next

                                Related Topics

                                Collapse
                                • Bowline
                                  Dell E6400 PT434 type Battery Charging Stuck at 1%. Battery Pinouts?
                                  by Bowline
                                  My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?

                                  Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?

                                  My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
                                  The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
                                  I have tried multiple different Dell power adapters. My Dell...
                                  06-11-2025, 10:13 AM
                                • Francesc V.
                                  Dell dockstation WD15 is dead
                                  by Francesc V.
                                  Hi:

                                  A friend gave me this DELL WD15 dockstation that does nothing. Not detected by computer, no digital output.........just leds shines when it’s plugged in.
                                  Here are the findings, followed by good pictures. :-)

                                  When pluged in, LED3 glows
                                  Measuring some voltage in the circuit.


                                  Inductors
                                  - PL202 has 5V
                                  - PL201 has 3.3V
                                  - PL300 has 1V

                                  V. Regulators
                                  - UT30 has 19v as input and 6V as output. It seems ok.
                                  - UT27 (same reference as UT30, has no input/output voltage).


                                  Thermal find...
                                  07-09-2025, 12:12 AM
                                • Andreasbest
                                  Dell Inspiron N5110 dead
                                  by Andreasbest
                                  Hello!
                                  Today i received a piece of junk N5110 that is completely dead.
                                  I see 19.5v on Drain of PU4002 and 2.7v @ PWRBT1 pin 3 that turns to 0v when i press the power button, nothing happens though, no led activity, no fan.
                                  Any advise welcomed ...
                                  04-27-2022, 09:25 AM
                                • YellowJacket
                                  DELL Latitude 5410 - dead; pwrbtn flashing
                                  by YellowJacket
                                  Hi folks,
                                  DELL Latitude 5410, board number FDZ41 LA-J371P Rev: 1.0 (A00), schematic uploaded in different post, here is the link --> https://www.badcaps.net/filedata/fetch?id=3484415

                                  When I connect it to a power ( DELL round charger, or USB-C ), LED on the power button starts flashing white, and the laptop doesn't do anything ( flashing slows for a very brief time in time when I press it, but it continues again ). Battery is not charging. While the charger is connected, I have few voltages present, but some of them are fluctuating, see attached pictures.
                                  All I was able...
                                  04-26-2025, 07:05 AM
                                • tracks
                                  Dell 3080 Micro BIOS dead
                                  by tracks
                                  Hello all,

                                  I have a Dell 3080 Micro with a problem. As it is right now, it seems to be boot looping, maybe... There's no output, just fan on and power led lights up and blinks off every 2 seconds or so.
                                  Previous owner told me he bought it with a BIOS password, he tried to use a CH341A programmer with some random test clip and tried to mess with it while it was powered on. Now it won't boot.

                                  I tried to dump the bios with an EZP2023+ but I can't get a consistent read. Every time the dump is different, so it's unusable. I think the BIOS chip is fried.

                                  ...
                                  04-19-2025, 03:42 PM
                                • Loading...
                                • No more items.
                                Working...