Macbook Air A3114 5V 0.0A after water damage

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • s_henya
    Badcaps Veteran
    • Jan 2011
    • 482
    • Israel
    #1

    Macbook Air A3114 5V 0.0A after water damage

    Hi Mac experts :-)

    Im usually not getting too many Mac logic boards repairs, (mostly PC laptops)
    This Mac isn't powering on not boosting to 20v, stays at 5v with 0.0Amps.

    Took out the board and it suffered some water damage, see attached pics.
    All cleaned with IPA but due to long time with corrosion something already got shorted...

    any advice on the below:?

    1. Looking for relatively safe location for voltage injection as all of the caps around that area has 0.0ohms resistance.

    I tried injecting 0.5v on one of the caps but got only 0.17A and couldn't detect any overheating with my thermal camera.

    anyone can note what is the area is responsible for?
    Attached Files
    Last edited by s_henya; Yesterday, 01:15 PM. Reason: Added pics
    Tags: None
    • s_henya
      Badcaps Veteran
      • Jan 2011
      • 482
      • Israel
      #2
      Updates:
      I suspect UC710 SN621371 (Power supply management chip)
      I injected 0.5V on CC715 and only this chip showed signs of slight overheating.

      any more ideas before i try to take it out?
      Attached Files

        Comment

        • mon2
          Badcaps Legend
          • Dec 2019
          • 14342
          • Canada
          #3
          Flux and lift up one leg of LC710. Then confirm which side of the LC710 you measure the short condition.

            Comment

            Previous template Next

            Related Topics

            Collapse
            • TimSinger
              MacBook Pro M4 16" A3403 on the table with water damage
              by TimSinger
              Hi guys,
              I have a MacBook Pro M4 16" A3403 on the table with water damage. I allready found the problem within a bad cap. As far as my researh went, I couldn't find the schematics and boardview for this MacBook model. They seem not to be released now. So my question is if anybody has a working A3403 on the table and could tell me, which specification this capasator has?
              I attached a photo of the missing cap. It's on the bottom side of the logicbard.

              I am very thankful for your replys.
              Thanks in advanced and best regards from Hamburg Germany...
              07-13-2025, 11:12 AM
            • dbuergi
              Macbook A1466 820-00165A heavy water damage but working with "flashing" screen
              by dbuergi
              Hi all,

              i got a A1466 with serious water damage. I was able to clean the whole board and only found a fuse with a coroded trace. Cleaning and resoldering did the job and the macbook started normal but after some time the screen began "flashing" like turning on and off while the Macbook was still running. I checked the board again but was not able to find the problem until now.
              Any ideas where to look?...
              11-07-2024, 10:57 AM
            • Grandoni Manuel
              MacBook a2289 water damage
              by Grandoni Manuel
              Hello to all ! I follow you but this is first time write !!
              your forum is the best !!
              so I’ve a2289 with water damage ! In first time other friend have clean and work ! But after some time stop working !
              now, I open the MacBook and I see a lot of corrosion near backlight circuit (I attach some photos about that ) I think the problem is on backlight maybe bcs do strange boot then reboot (attach video ) I change some thing on the circuit like :
              q8400
              q8401
              D8410
              and the resistor R8431

              if I check PPVIN SOSW LCDBKLT_R I’ve 12,9v
              on...
              04-03-2025, 06:45 PM
            • dbuergi
              Macbook A1708 with water damage and problems after removing U2800
              by dbuergi
              Hi all,

              i got a A1708 with water damage. I cleaned everything and the board started normal. But the next day i got 20v but no booting. Thermal cam showed over 160c (never had a chip getting this burning hot before) in U2800 and some shorts on the caps around it. After removal shortages were gone and i installed a donor U2800 which worked before.
              Sadly now the device stays at 5v, 0,4a and 1,9w and i don't find the problem.USB ports worked fine before....
              03-17-2025, 06:27 AM
            • TheNuclearOption
              Macbook Pro (820-2773) 20 ohm partial short on the pp3v8 power rail after water damage
              by TheNuclearOption
              water damage to the left speaker channel circuit caused an internal board short that has been carved out and damage to various capacitors. I removed both chips ur630 and ur600 both were burnt. Im not sure how to track down this partial short. Any suggestions would be greatly appreciated.

              The fuse is blown on ppbus and im getting 12.24v to the ppvbatt side of the fuse
              03-11-2024, 06:16 PM
            • Loading...
            • No more items.
            Working...