A1466 - 820-00165-A no boot 40ma

[LCDR2]

Hello,

We have a Macbook Air not powering on.
Draws 40ma

We have PP3v3S5 but no S4 rails
S4 Power Enable is missing

PM SLP S5 L is 0v
SMC_S4_WAKESRC_EN 0v

PP3V42_G3H 3.44v
SMC RESET L 3.4v

Is this SMC issue?

SMC is not hot.

 

[LCDR2]

#1 (internal ref)

 

[2informaticos]

What means second post???

Missing SMC_PM_G2_EN?
Check voltages and signals for U5000 (2 of 2) at page 37.

 

[LCDR2]

The second post is for our internal reference so I could tie it to the thread. It's a "board only" job so no customer or anything visual to tell it apart from the other jobs.

 

[LCDR2]

SMC_PM_G2_EN is 3.6v
PP3V3 S5 SMC VDDA 3.43v
SMC_WAKE_L 3.089v
SMC_CLK32K 1.732
PP1V2_S5_SMC_VDDC 1.2V
PP3V3_S5_AVREF_SMC 3.3V
SMC TCK 3.43
SMC TMS 3.43
SMC TDO 3.42
SMC_TDI 3.43
SMC EXTAL 100mv
SMC_XTAL 80mv