Re: Macbook 13" A1278 2009 (K24) No power
Ok thanks, I won't try before it is replaced then
Ok thanks, I won't try before it is replaced then
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Re: Macbook 13" A1278 2009 (K24) No power
Ok I got the q7021 replacement chip, I installed it in place of the bad one ...
The green LED is still turning on but the Mac is not turning on from the Magsafe only and It won't charge the battery ... Looks like it's time to check some voltages again ^^Comment
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Re: Macbook 13" A1278 2009 (K24) No power
Well I've checked with 2 other working & genuine magsafe psu (60W or more) and they are not turning to green light ... Very strange ...Comment
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Re: Macbook 13" A1278 2009 (K24) No power
What is the needed signals/power sources needed to be able to start from magsafe ?
I did check again signals around Q7000/Q7001 and it seems better than at the beginning :
Q7001 : pins 1/2/3 => 11,43V, pin 4 => 10,4V , but pin 5 is still around 0V
Q7000 : pins 1/2/3 => 16,7V, pin 4 => 15,1v but pin 5 is still around 0V
CHGR_DCIN (pin 2 of U7000) is still 0V, I though that it could be because of a dead D7010 (red circle on the attached image), but it appears that pin 1 of D7010 is grounded ... Possibilities are a dead U7000 or a dead C7010 ... But C7010 is not critical so not sure if it could be the problem...
BTW is this possible to check D7010 knowing that pin one is grounded and pin 2 is connected to ground by a 39,41 Kohms equivalent resistor (R7010+R7011) ? I'm afraid that it could be dead as it's pin 1 is grounded and pin 2 is connected to 18,5V from magsafe ...Attached FilesLast edited by sylver; 07-08-2015, 03:20 PM.Comment
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Re: Macbook 13" A1278 2009 (K24) No power
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Re: Macbook 13" A1278 2009 (K24) No power
Just one thought : if D7010 was OK, as it's grounded, PP18V5_G3H_CHGR (= voltage on pins 1/2/3 of Q7000) should be 0 instead of 16.7v right ?
Am I right and it means that D7010 is dead, or I'm missing something in my logic and having 16.7v for PP18V5_G3H_CHGR is normal in this case even with an OK D7010 ?Comment
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Re: Macbook 13" A1278 2009 (K24) No power
I didn't check if it was shorted but it's still 0v, so I guess it is ! I'll check anyway when possible !
Pin 1 of D7010 which is grounded is connected to pin 2 of U7000, so pin 2 of U7000 is actually grounded also ! Ok I have no choice, I'll remove U7000 ... I'll be my first try to remove this kind of component
wish me good luck 
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Hey! This is a A1278 macbook 2011.
Problem: Not turning on / No green light
Im using by3200s charger.
Voltajes:
PPBUS_G3H = 12.26v
SMC_RESET_L = 3.3v
PP3V42_G3H = 3.42v
U7000 =
Pin 1 CHGR_AGATE = 0v
Pin 2 CHRG_DCIN = 19v
Pin 3 CHRG_ACIN = 4.6v
Pin 10 SMBUS_SMC_BSA_SDA = 3.3V
Pin 11 SMBUS_SMC_BSA_SCL = 3.3V
Pin 12 PP3V42_G3H = 3.42v
Pin 13 CHRG_RST_L = 3.3V
Pin 14 SMC_BC_ACOK = 0.8V
Pin 19 PP5V1_CHRG_VDD = 5.05V
Pin 20 PP5V1_CHRG_VDDP = 5.03V... -
Hello, I am looking for any and all files related to the mainboard for 820-2565-A (13" Macbook Pro A1278 mid 2012) schematics/board view.
I looked through forum search results and google and was unable to find a board view file, I found a pdf of all the schematics but I don't know where the parts physically are on the board as this is my first macbook board level repair attempt.
The macbook charger has a green light, the battery has been replaced and OS reports Normal status but Not charging. After cleaning a corroded capacitor it crumbled off the board. There... -
Subject: Help Needed: MacBook A1278 (3115) No PPBUS_G3H Issue
Hello everyone,
I'm working on a MacBook A1278 with the 3115 logic board and facing an issue with no PPBUS_G3H voltage. Here's what I've checked so far:- U7000 Measurements:
- Pin 3 has 0V, even though R7012 shows 16.5V from PPDCIN_S5_CHGR.
- Resistors:
- I measured R7010 and R7011 with one leg disconnected, and both tested OK.
Based on these findings, I believe U7000 needs to be replaced. However, I have a related question:- If I also decide to replace the SMC, do I need to order it pre-programmed,
- U7000 Measurements:
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please clear me this bios efi macbook macbook pro 13 inch a1278 820-2879... -
Hi everyone!
I have a 2018 MacBook Pro (with Sequoia OS) that I've been using for years with no problem. I recently received an M2 MacBook Pro so I'm mostly using it and not the 2018 one, but since a friend of mine needs a computer, I thought I could restore my 2018 and give it brand-new-like to my friend.
I tried using the built-in tool to restore the MacBook (Settings > General > Transfer or restore > Delete) but it got stuck when trying to remove the Find Device configuration (it asked me for the password for my old Apple ID -now I use the same account but...06-27-2025, 08:54 AM
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