Macbook A1466 (820-00165) Stuck at Green Light

[Instafixx]

Came in with No MagSafe Light and PPBUS at 8.18V

Corrosion at U3710. Replaced . A couple of resistors below the RAM also were green. Replaced them too.

Now PPBUS is 8.6V (Both Sides of the Fuse)
PP3v42 is 3.4V
Get green MagSafe light . No Fan Spin

PM_SLP_S4_L is pulsing.
U1950 voltages except Pin 8 are pulsing.

 

[2informaticos]

All big coils pulsing?
Do you note any drop pulse at F7140 output pin?

 

[Instafixx]

Big Coils not pusling.
No drop in pulse at both ends of the Fuse

 

[2informaticos]

"PM_SLP_S4_L is pulsing"
At least L7520 shouuld pulse.
3V3_S5/SUS are both steady?

Check diode mode to ground on all big coils.
Try starting in SMC bypass mode.

 

[Instafixx]

Today.
All big coils 0V.
PM_SLP_S4_L is 0v

 

[2informaticos]

Check SMC_PM_G2_EN.

 

[Instafixx]

Was probing around the Resistors near the RAM that was corroded.
Suddenly I get orange light and fan spin and all stable voltages. Machine now on.

 

[Instafixx]

Hi it went off again.
No Light.
PPBUS at 8.18V

All big coils 0V.
PM_SLP_S4_L is 0v
SMC_PM_G2_EN is 0v

 

[2informaticos]

SMC_RESET_L?

 

[Instafixx]

Checked At R5100 is 0.4V

Replaced R5100 - still the same.

Reballed the SMC - still the same?

Replace SMC ?

 

[2informaticos]

Post U5110 voltages.
Clean/remove J6100 if looks corroded.

 

[Instafixx]

Abnormal Values:

SMC_MANUAL_RST_L is 0.4V
SMC_RST_L is 0.4V
AVREF_SMC is 0V

 

[2informaticos]

Can't you post all U5110 voltages?

 

[Instafixx]

Pin 1 - 3.4V
Pin 2 - 0V
Pin 3 - 3.4V
Pin 4 - 0.4V
Pin 5 - 0.4V
Pin 6 - 0.4V
Pin 7 - 3.4V
Pin 8 - 0.4V

 

[2informaticos]

If no short on any pin, change U5110.

 

[Instafixx]

Diode Mode Readings

SMC_MANUAL_REST_L is 1.1
SMC_LSOC_RST_L is 1.2

Very high

 

[2informaticos]

Change it anyway.

 

[Instafixx]

Replaced. Switches on now.