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Old Yesterday, 03:48 AM   #3426
ajiebali
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Join Date: May 2014
Quote:
Originally Posted by fega72 View Post
Do you have any voltage on the LB battery connector without the charger?
Also try with disconnected battery indicator.
STATUS:
Battery: Connected
Magsafe: Disconnected


STATUS:
battery: Connected
magsafe: Connected (green Light)


Ps:
-Battery Indicator Status Disconnected
-Macbook status Off

Many Thanks
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Old Yesterday, 04:02 AM   #3427
fega72
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Join Date: Dec 2014
Quote:
Originally Posted by ajiebali View Post
Ps:
-Battery Indicator Status Disconnected
-Macbook status Off

Many Thanks
I have to go now but will back soon
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Old Yesterday, 07:28 AM   #3428
funtotos
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Join Date: Apr 2013
Quote:
Originally Posted by funtotos View Post
Hey,
I have a macbook pro 13 820 3115-B won't start.
Spilled liquid all cleaned off OK
It does charge the battery and have a solid green light.
Where is 3.42v at G3Hot power pad ?With keyboard no fan, no chime, no video , no signs of life at all. Anybody have the same problem that I have want to share where the problem is.

i have bordview and shematic
I do really appreciates you guys input.
thanks
i check 2.3mv ...

i need help
thanks you
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Old Yesterday, 07:57 AM   #3429
funtotos
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Join Date: Apr 2013
Quote:
Originally Posted by funtotos View Post
i check 2.3mv ...

i need help
thanks you
Image
PP5V_SUS Probe:1133
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Old Yesterday, 09:02 AM   #3430
fega72
macrumors newbie
 
Join Date: Dec 2014
Quote:
Originally Posted by ajiebali View Post
Battery: Connected
Magsafe: Disconnected
Many Thanks
OK, so you have battery voltage on the battery connector. What about G3HOT (3.425V)?
If there is no G3HOT check the double diode Q7080.
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Old Yesterday, 11:35 AM   #3431
bouba148
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Join Date: Mar 2015
Quote:
Originally Posted by cmdrdata View Post
If you have no G3HOT at one of this power on test pin (battery only, magsafe only or both), then forget about getting 12v at the second fuse. G3HOT powers the SMC, thus without it none of the power FETs that control voltages to the system will not be turned on. There is a pair of diodes that the cathodes are tied together to the input of the G3HOT (one from battery and the other from magsafe). This is then down regulated by a regulator chip to generate the 3.42v. You have to track this down and figure out why 3.42 is not on before going any further.
Hi cmdrdata,
I'm in the same case: no G3HOT, after several days and night of troubleshooting, i've tracked the power of the magesafe/battery till the U6990, and in my case the G3HOT is shorted to the ground (0,03V).
Then I removed the U6990: short circuit still there.
Removed and mesured R6994 and R6995: both are OK
I'm suspecting C6999, but because of that short circuit i can't locate it ( i've already removed some shorted caps but without success)
So my question: could someone provide me the components "maps" diagram for my logic board wich is A1278 EMC 2351 820-2879 or tell me where is located C6999.
i've already a brdviewer wich is named "Landrex".
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