Macbook Air 11" 2015 820-00164 No charging light. Boots up with battery removed.

ton68

New member
Hello all,

I need some help with this 2015 Macbook Air A1465 Board is a 820-00164. The computer boots with the power cable but only with the battery disconnected. Swapped out three different battery's which will work until the batteries die as they are not being charged. Removed from the system the board gets power and the fan turns on but no green or orange light. When powered on with the cable it last 15 minutes until it shutsdown and requires the wall outlet to be unplugged and the computer restarted.


PPBUS g3h 8.58-8.59

I tried to measure everything related to power and charging I could find with or without a battery connected to try and find and I found the voltage to the PPVBAT_G3H_Conn drops when a battery is connected. While searching the forum a user had a similar issue and it ending up being related to "a bad trace of SYS Detect L" but there was no explaining of the fix. Any assistance would be greatly appreciated.


J6950Wall onlywith battery
1​
PPVBAT_G3H_Conn
8.59​
0.1​
2​
PPVBAT_G3H_Conn
8.59​
0.1​
3​
PPVBAT_G3H_Conn
8.59​
0.1​
4​
SMBUS_SMC_5_G3_SCL 3.43
3.43​
3.43​
5​
SMBUS_SMC_5_G3_SDA 3.43
3.43​
3.43​
6​
SYS_DETECT_L
0​
0.23​
R5390
1​
PP3V3_S0
3.33​
2​
SMBUS_SMC_5_G3_SDA
3.33​
R5391
1​
PP3V3_S0
3.33​
2​
SMBUS_SMC_5_G3_SC
3.33​
C6951
1​
PPVBAT_G3H_CONN
0.14​
2​
GND
0​
C6950
1​
PPVBAT_G3H_CONN
0.14​
2​
GND
0​
D6950
1​
SMBUS_SMC_5_G3_SCL3.23-3.4
2​
SMBUS_SMC_5_G3_SDA3.23-3.4
3​
GND
0​
Q7155
1​
PPVBAT_G3H_CHGR_R
8.56​
8.56​
2​
PPVBAT_G3H_CHGR_R
8.56​
8.56​
3​
PPVBAT_G3H_CHGR_R
8.56​
8.56​
4​
CHGR_BGATE7.89 - 1.22
7.9​
5​
PPVBAT_G3H_CONN
8.56​
0.14​
U5110
1 PP3V42_G3H 3.42
3.42​
3.42​
2 GND_SMC_AVSS 0
0​
0​
3 PP3V42_G3H_SMC_SPVSR 3.42
3.42​
3.42​
4 SMC_MANUAL_RST_L .98
0.98​
0.98​
5 SMC_RESET_L 3.11
3.11​
3.11​
6 SMC_LSOC_RST_L 3.25
3.25​
3.25​
7 SMC_ONOFF_L 3.39
3.39​
3.4​
8 PP3V3_S5_AVREF_SMC 3.28
3.28​
3.28​
R5100
1​
PP3V42_G3H
3.42​
3.42​
2​
SMC_RESET_L
3.14​
3.11​
R7100
1 SMC Reset L
3.11​
2​
CHGR_RST_L
3.11​
J6100
1​
GND
0​
2​
PP3V42_G3H
3.42​
3​
SPI_ALT_CLK
1.58​
4​
SPI_ALT_IO0_MOSI
0.04​
5​
SPI_ALT_CS_L
3.28​
6​
SPI_ALT_IO1_MISO
3.28​
7​
SPIROM_USE_MLB
3.34​
8​
SPI_ALT_IO2_WP_L
3.34​
9​
SMC_TMS
3.4​
10​
SPI_ALT_IO3_HOLD_L
3.34​
11​
SMC_TCK
3.4​
12​
SMC_RESET_L
3.11​
13​
GND
0​
14​
GND
0​
15​
GND
0​
16​
GND
0​
R6950
1​
SYS_DETECT_L
0​
0.22​
2​
GND
0​
0​
C7116
1​
CHGR_VNEG_R
1.4​
2​
PPVBAT_G3H_CHGR_R
8.56​
R7116
1​
CHGR_VNEG
1.46​
2​
CHGR_VNEG_R
1.4​
 
Last edited:

2informaticos

Administrator
Staff member
First of all, welcome to the forum!

Ooops, lot of time wasted with measurments.
SYS_DETECT_L looks good in your case (0V).

Battery can't be charged until get Magsafe light!
So that's the first thing to fix.
You must get amber light, even without battery.

Did you test with known good LIO board/flex?
As you didn't mention any audio related problem, 3V42_G3H connection must be good.
I suspect a problem with SYS_ONEWIRE line.
Inspect J9500 pins for corrosion.
 

ton68

New member
First of all, welcome to the forum!

Ooops, lot of time wasted with measurments.
SYS_DETECT_L looks good in your case (0V).

Battery can't be charged until get Magsafe light!
So that's the first thing to fix.
You must get amber light, even without battery.

Did you test with known good LIO board/flex?
As you didn't mention any audio related problem, 3V42_G3H connection must be good.
I suspect a problem with SYS_ONEWIRE line.
Inspect J9500 pins for corrosion.

Thanks you for the advice I don’t see any corrosion on the J9500 ..

I replaced the LIO and cable with no success but it was a used item seller said it worked but who knows.

With the board plugged in I measured on the LIO board pin 3 adapter sense if on j6910 and it’s 0…

u6900
Pin 4 sys one wire : 0
Pin 5 adapter sense uf in R: 0
Pin 1 smc bc sock cc: 0

R6900
Sysone andsmc bc acok vcc both 0

u6901

pin 1 and 2 Smc bc acok both 3.33
Pin 4 smc bc acok vcc: p
Pin 5 pp3v42 G3h :0
Thank you again
 
Last edited:

2informaticos

Administrator
Staff member
"Pin 5 pp3v42 G3h :0"
As expected, 3V42_G3H voltage doesn't arrive to LIO board.
So you have bad LIO flex, or connectors.
I fixed such a problem few times bypassing with tiny wire directly from L7095/C7098.

BTW, write directly into reply box, instead of clicking Reply button.
I don't see any reason to quote an entire post, visible few centimeters above.
Please, maintain forum esthetic.
 

ton68

New member
Sorry about copying the previous reply…I ending buying a new LIO board and cable and still no light or no 3V42_G3H on the LIO board which connections would I need to connect to bridge the issue and is there any measurement I can make to confirm what component is at fault…. Thanks again
 
Last edited:

ton68

New member
Thank you I ran the wire and have green to yellow light but no battery detection. OS Monterey boots with power plugged in and battery connected but there is no battery icon. When check the battery capacity in terminal it shows 0. I downgraded to High sierra and still have the same issue. When I pull the power the computer shuts off. Measurements with the machine power on and plugged in show a low PPBUS G3H. I ordered another battery but with the low PPBUS I am worried I may have shorted something when diagnosing or fixing the sysone line. The machine functions although it does feel a little laggy.

ppdcin_g3H
19.2​
ppvBat_G3H_Conn
0.22​
ppvBat_G3H_Chgr_r
8.2​
PPBUS_G3H
8.2​
P3v42_G3H3.38
SMBUS_SMC_5_G3_SCL
.48
SMBUS_SMC_5_G3_SDA
0.02
SYS_DETECT_L0.23


Edit : Was measuring the Test Point for Chgr_DCIN for U7100 which measured 19v the light on the charged shut off and fan went off. PPBUS G3H is now 0V PP3v42 is still 3.38. The board will not power on at all now.
 
Last edited:

ton68

New member
U7100with out battery
1​
Chgr_agate
18.55​
2​
Chgr_DCIN
19.79​
3​
Chgr_ACIN
0​
9​
CHGR_AMON35 mV
12​
PP3v42G3H
3.36​
13​
CHGR_RST_L
3.32​
14​
SMC_BC_ACOK1.5mV
17​
CHGR_CSO_N4.5 mV
19​
PP5V1_CHGR_VDD
5.03​
20​
PP5V1_CHGR_VDDP
5.03​
27​
CHGR_CSI_N
0​
 

ton68

New member
Diode Mode ACIN 0.000

R7110 is reading 17.09v on pin 1 PPDCIN_G3H_ISOL and pin 2 CHGR_ACIN is 0 and its resistance reading 90k ohm

R7111 resistance reading 1 ohm

R7105 resistance is reading 1k ohm

do i need to swap out R7110
 
Last edited:
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