2 Magsafe LED not turning on, not charging
Hello! I have a Macbook without led on the charger, i have changed the battery and its brand new, still nothing.
The charger is giving power, tested.
So i went trough some troubleshooting and measured some voltages:
U7001:
Pin 5: 3.40V
Pin 4: 0V
Pin 3: GND working
Pin 2: 0V
Pin 1: 0V
U7000:
Pin 5: ///
Pin 4: ///
Pin 3: ///
Pin 2: GND working
Pin 1: 0V
C7000
Giving continuity if power is conencted, no continuity if no power is connected
Is there anything else i should be looking for? Thank you for replies!
crwdns2934109:0crwdne2934109:0
crwdns2889612:0crwdne2889612:0
1
3 
3 
crwdns2944067:015crwdne2944067:0
Have you tried resetting the SMC? https://support.apple.com/en-us/HT201295 Also, what is the condition of the MagSafe port, do you see any burnt pins or debris?
crwdns2934271:0crwdnd2934271:0 Zach crwdne2934271:0
@zpl I also changed Magsafe port, just to be sure everything was new.
I cant reset SMC because keyboard isn't working, is there any other way to do it?
crwdns2934271:0crwdnd2934271:0 Fra Emerald crwdne2934271:0
What is you motherboard number (820-XXXX)?
crwdns2934271:0crwdnd2934271:0 honakrisi crwdne2934271:0
@honakrisi it's 820-4924 a a1502
crwdns2934271:0crwdnd2934271:0 Fra Emerald crwdne2934271:0
I take it you get the charger voltage on the output of the fuse?
If you measure 0V on pins 1 and 2 on U7001, that means your SMC_BC_ACOK input is missing therefore there is nothing powering your U7000.
Check pin 14 on U7100 (ISL6259). That is CHGR_ACOK which becomes SMC_BC_ACOK. I am guessing it will be 0V. You may have an issue with the current sensing resistors R7120/21/22.
crwdns2934271:0crwdnd2934271:0 honakrisi crwdne2934271:0
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