a1466 no power

[Arshad alam4659]

i have a1466 no power
PPBUS_G3H=8.56v
P5VP3V3_VREG3=3.3v
PP3V3_S5=0v
PP5V_S5=0v
SMC_RESET_L=3.3v
PP3V42_G3H=3.42v
SMC_ONOFF_L=3.3v
SMC_BC_ACOK=3.3 v
SMC_PM_G2_EN=0v it comes from smc is smc bad or not
What inputs does smc need to generate SMC_PM_G2_EN anyone help

[mon2]

https://logi.wiki/index.php/G3_to_S3..._and_Broadwell

Check the operation of the local xtal of the SMC.

[Arshad alam4659]

https://logi.wiki/index.php/G3_to_S3..._and_Broadwell

Check the operation of the local xtal of the SMC.

Y1950=12MHZ
Y5110=NOTHING IF I PRESS SMC 12MHZ GENERATED BUT NO POWER

[mon2]

Wait on other comments but you may need to flux and reflow the SMC chip. I recall having to do the same a few years ago.

MacBook Air A1466 " 820-00165 " No Power Repairs (SMC REFLOW) (youtube.com)

[Arshad alam4659]

Wait on other comments but you may need to flux and reflow the SMC chip. I recall having to do the same a few years ago.

MacBook Air A1466 " 820-00165 " No Power Repairs (SMC REFLOW) (youtube.com)

thanks i try

[Arshad alam4659]

Wait on other comments but you may need to flux and reflow the SMC chip. I recall having to do the same a few years ago.

MacBook Air A1466 " 820-00165 " No Power Repairs (SMC REFLOW) (youtube.com)

I REFLOWED THE SMC AND SMC_PM_G2_EN=3.3V AND PP3V3_S5=3V BUT P5VS4RS3_EN IS MISSING AND PM_SLP_S4_L IS ALSO MISSING

[mon2]

Review the flow chart to study the conditions required for PM_SLP_S4_L.

P5VS4RS3_EN comes out from S4_PWR_EN & PM_SLP_S4_L

[reformatt]

Make sure you are using a genuine charger first for PM_SLP_S4 issues, as knock offs do not trigger PM_BATLOW_L high unless a battery is connected.

All SMC related faults you check for corroded caps around the SMC itself and check PP3V3_S5_AVREF_SMC and PP1V2_S5_SMC_VDDC are both present. Sometimes SMC's need reballing, especially if there is corrosion pn the pads or the SMC itself.

[Arshad alam4659]

Make sure you are using a genuine charger first for PM_SLP_S4 issues, as knock offs do not trigger PM_BATLOW_L high unless a battery is connected.

All SMC related faults you check for corroded caps around the SMC itself and check PP3V3_S5_AVREF_SMC and PP1V2_S5_SMC_VDDC are both present. Sometimes SMC's need reballing, especially if there is corrosion pn the pads or the SMC itself.

i have a new smc but how to program this

[Arshad alam4659]

Review the flow chart to study the conditions required for PM_SLP_S4_L.

P5VS4RS3_EN comes out from S4_PWR_EN & PM_SLP_S4_L

I CHECKED 11+1 REQUIREMENT IS PERFECT BUT PM_SLP_S4_L IS MISSING

[reformatt]

Replacement SMC's must come from a donor board. They can't be programmed from blank unfortunately. There is a flashing tool to reprogram when using a SMC from a dissimilar board but the board must at least boot to run the tool.

Check you don't have a single or double pulse of voltages up to Vcore after initial power on. This is a common issue on 820-00165 boards.

[Arshad alam4659]

Replacement SMC's must come from a donor board. They can't be programmed from blank unfortunately. There is a flashing tool to reprogram when using a SMC from a dissimilar board but the board must at least boot to run the tool.

Check you don't have a single or double pulse of voltages up to Vcore after initial power on. This is a common issue on 820-00165 boards.

TOOL NAME AND HOW TO MAKE USE BOOTABLE

[reformatt]

https://github.com/MuertoGB/SMCTool

Board has to be bootable, so you need a SMC from 820-3437 board etc. Another user mentioned they were able to use a SMC from an A1502 board on an Air.