Go Back   MacRumors Forums > Apple Hardware > Notebooks > MacBook Pro

Thread Tools Search this Thread Display Modes
Old Dec 31, 2013, 08:57 AM   #1
macrumors member
Join Date: Dec 2013
Location: Central New York
Early 2011 Macbook Pro Logic Board problems

I have been driving myself nuts with this water damage macbook pro. I have already fixed to no video problem, and the usb's not working. Now I am left with the infamous no charging problem. I have read threw a ton of forums here and elsewhere as well. My problem is defiantly not software a SMC reset does nothing.

Things I have done so far:

Cleaned the board with 99.9% alcohol

I bought the schematic for it and traced everything to do with the charging circuit that I could find. There are a couple of sections that I am unable to locate on the board, like "U6990". If someone could show me a picture of what it looks like I could find it pretty easy.

The weird thing is I have 16.45v readings all the way down not even and inch from the battery connector but only 2 pins read 3.45v on the battery connectors pins 4 & 5 if I remember right.

The computers boots from battery power and will run off AC power as well. The fans is at full speed but everything else work just not the charging circuit.

I have tried different magsafe power cord and adapter the connect to logic board. I have cleaned the charger pins on both the cord and the adapter, done SMC reset a few times, I swapped out the battery for a know good one.

I know it is something in the charging circuit that is either shorted out or carotid or maybe a fuse blown but again like I said above I am having a hard time identifying all the components of the circuit.

OH the logic board is a early 2011 Macbook pro 13" with the core i5 cpu 2.3GHz
Board is the ( K90i )

I know there is a ton of threads on this topic in here I just didn't want to hi-Jack someones thread and I couldn't find a thread specific to this logic board. Thanks in advance for any help someone can give me. Happy Holidays

I attached some pictures [MOD NOTE: schematic removed]
Attached Thumbnails
Click image for larger version

Name:	2011 MBP Logic board.JPG
Views:	87
Size:	2.86 MB
ID:	454027   Click image for larger version

Name:	top view.JPG
Views:	62
Size:	2.96 MB
ID:	454028  

Last edited by balamw; Jan 3, 2014 at 06:44 PM.
tswartfiguer is offline   0 Reply With Quote

MacRumors Forums > Apple Hardware > Notebooks > MacBook Pro

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
Swap the logic board in a macbook pro mid 2010 for an early 2011 logic board croma Mac Basics and Help 8 Jan 23, 2015 05:00 PM
Early 2011 15' Macbook Pro - Logic Board Failure brennan135 MacBook Pro 17 Oct 20, 2013 06:16 AM
Early 2011 Macbook Pro 15" water spill/ logic board mercuryguy MacBook Pro 6 Aug 3, 2013 04:14 AM
MacBook Pro 13" late 2011 logic board replacement. nickandre21 MacBook Pro 13 Jul 27, 2013 08:41 PM
late 2011 Logic Board in Early 2011 Enclosure? Z400Racer37 MacBook Pro 0 Jan 22, 2013 01:20 PM

Forum Jump

All times are GMT -5. The time now is 05:53 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2015, MacRumors.com, LLC