A2141 No power 5v .32 Amps

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Stephen
    Meow Meow MEOW!
    • Apr 2020
    • 674
    • United States

    #1

    A2141 No power 5v .32 Amps

    As the listing states, replaced the faulty CD3217 chips on board boot loop is gone, put thermal camera on to see whats going on, T2 chip is showing a lot of heat around 100 degrees compared to the other areas around way less. Curious if I am seeing a faulty T2 chip or am I missing something? A little help would be great for this board.

    G3H is at 5V

    5V .32 amps on meter.

    boot loop on meter is gone now.
    sigpic
    MEOWING IN THE IMPOSSIBLE UNIVERSE!
  • Stephen
    Meow Meow MEOW!
    • Apr 2020
    • 674
    • United States

    #2
    Re: A2141 No power 5v .32 Amps

    Took the cover off the chip, it is around now 101 degrees and climbing. I may be correct but I am ASSUMING the T2 chip is faulty?
    sigpic
    MEOWING IN THE IMPOSSIBLE UNIVERSE!

    Comment

    • mon2
      Badcaps Legend
      • Dec 2019
      • 14662
      • Canada

      #3
      Re: A2141 No power 5v .32 Amps

      Any nearby shorted cap that may be throwing off the thermal camera?

      Comment

      • Stephen
        Meow Meow MEOW!
        • Apr 2020
        • 674
        • United States

        #4
        Re: A2141 No power 5v .32 Amps

        No, just shows the heat on the chip itself. Turned the board over and the heat is centered perfectly on the T2 chip area. The chip is now sitting at 101 degrees.
        sigpic
        MEOWING IN THE IMPOSSIBLE UNIVERSE!

        Comment

        • Stephen
          Meow Meow MEOW!
          • Apr 2020
          • 674
          • United States

          #5
          Re: A2141 No power 5v .32 Amps

          Great, now I am getting a boot loop at one of the connections and the T2 chip itself is very hot.
          sigpic
          MEOWING IN THE IMPOSSIBLE UNIVERSE!

          Comment

          • Stephen
            Meow Meow MEOW!
            • Apr 2020
            • 674
            • United States

            #6
            Re: A2141 No power 5v .32 Amps

            Now boot loop is gone on the meter. Odd. T2 chip at 102 degrees
            sigpic
            MEOWING IN THE IMPOSSIBLE UNIVERSE!

            Comment

            • piernov
              Super Moderator
              • Jan 2016
              • 4439
              • France

              #7
              Re: A2141 No power 5v .32 Amps

              Check voltages and resistances to ground as usual.
              OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

              Comment

              • Stephen
                Meow Meow MEOW!
                • Apr 2020
                • 674
                • United States

                #8
                Re: A2141 No power 5v .32 Amps

                Forgot we had an SOFix Tester, plugged up tester to the JB500 Connector,

                All pins read good except pin 42

                Reading is 72 while the good value is 738. I tested for short but nothing came up from that area.

                Pulled a good (activaiton locked board) reading was good so value is supposed to be at 738 (pulled 742)

                I am curious why Pin 42 is pointing to DB529 And the USB C chip on pin 90. Any ideas why this is, it is soldered on correctly and there are no shorts on the board after testing for short to ground.
                sigpic
                MEOWING IN THE IMPOSSIBLE UNIVERSE!

                Comment

                Related Topics

                Collapse

                • ACS-Repair
                  MacBook Pro A2141 820-01700 Boot loop
                  by ACS-Repair
                  Hello All,

                  I was handed a 2019 MacBook Pro A2141 that is boot looping. There is never a display or backlight but there is a chime about every 8-10 seconds.
                  I plugged in a USB-C meter and it see that it is negotiating 20 volts but there is no current draw at all. Voltage is stable, no resets.
                  It appears that the battery has a charge but possibly is not charging.

                  The following voltages are present:
                  PPBUS_G3H = 12.61V
                  PP3V3_G3H = 3.33V
                  PP3V3_GH3HRTC = 3.33

                  I haven't worked n one of these before so I have limited experience with...
                  02-04-2025, 07:48 PM
                • Takeatry
                  Yet another Samsung QLED Boot Loop
                  by Takeatry
                  Samsung QLED QN50Q — purchased 2022 started experiencing a delay in the picture coming on in the morning less than 2 years later. Did not know the term boot loop at that time. As the loop delay ran into a few minutes did all the recommended troubleshooting, soft and hard reset, changing cables and outlet locations, no help. As the delay increased contacted Samsung tech group and allow them remote access the tv. Tech was moving too fast to see exactly what he was doing but this ultimately it was also no help. Lived with the delay until it stretched out over 6 hours. Pulled of off the back cover...
                  10-04-2024, 02:57 PM
                • AppleLover123
                  Acer Nitro 5 comes on then goes off
                  by AppleLover123
                  Hey guys,

                  i've got this laptop from a friend who gave it to me in a dead state.


                  The laptop wasn't working at all so i've began my search on the 19V power rail.
                  It was shorted to ground so i injected voltage and the only thing getting hot was my ground clip from my power supply.
                  I found that the +1.05V Rail for the Chipset was shorted. i removed the coil and it was shorted on the power delivery side.
                  The pch seems fine bc the rail has over 50 ohms after i removed the coil.

                  Still nothing was getting hot so i suggested the chip must...
                  10-09-2025, 04:51 PM
                • Stephen
                  A2141 Boot Loop Issue
                  by Stephen
                  Board has no signs of water damage. Board had the APPLE error logo when recieved, reset with DFU and restored and installed new os.

                  OS installed but then it would not post and boot loop with a hard fan spin over and over. The apple logo will not appear and the bar will only reach about a quarter of the way and loop again. I tried DFU again with REVIVE and it still continues.

                  Attempted Safe Mode and the computer does however boot into safe mode.

                  So the computer boots into safe mode but will not post normally. Any suggestions? This is new to me and would...
                  07-21-2021, 04:01 PM
                • Stephen
                  A2991 Logic Board issue, 20volts 0 amps help!
                  by Stephen
                  Customer plugged in samsung monitor into the board and used it as a power supply, killed UG800 and UG400. I replaced those two with an exact donor board we had In stock and working, board pulls 5volts and then gets like 2.89 amps on the left side. The singular port is the port that failed. Used a perfectly working chips from donor (board was locked) Now I only get 5volts 0 amps on that power and then 20volts 0 amps on the two left side ports, I checked for DFU and nope nothing, computer not turning on. No shorts present anymore. I am confused as I used the exact components from an identical...
                  09-10-2025, 03:16 PM
                • Loading...
                • No more items.
                Working...