customer used a 20$ macbook air charger

[andrew boren]

i have a 820-3462-a board checked voltages and i dont get a green light, yet i get 3.4v on adapter sense. i checked around all fuses to see if power was good and have not found a line with no power. any idea? think it may have sent a spike to the cpu?

 

[dukefawks]

PP3V42 and PPBUS_G3H voltages? SMC_BC_ACOK present?

 

[andrew boren]

12.28v ppbus_g3h tested at R6905

3.41v pp3v42 tested at C6908

3.42v smc_bc_acok tested at c6900

 

[dukefawks]

SMC not running. Is SMC_RESET high?

 

[andrew boren]

smc reset is 3.4v checked on r7000

 

[aprendiz]

Seems you SMC is dead....

 

[andrew boren]

would i get smc_bc_acok if the smc is dead?

 

[dukefawks]

Either dead SMC or corrosion under it.

 

[andrew boren]

ok well im 100% sure there is no corrosion under the smc, ive looked over the entire board for some sign of water, but im sure she fried it plugging in a fake air charger. how can i go about getting an smc? i know they are model specific

 

[dukefawks]

Before we condemn the SMC check for 3V on L7260 first.

 

[andrew boren]

there we go, no voltage on L7260

 

[andrew boren]

ive got 12v on C7240

 

[aprendiz]

Q: Is P3V3S5_EN present?
A: Yes, measure resistance to GND on L7260
A: No, Check R7940 and check if SMC_PM_G2_EN is present....

 

[dukefawks]

Nah, SMC is not running for sure. Get a donor board and swap it. Donors are on Ebay and aliexpress

https://nl.aliexpress.com/item/1pcs...-13-A425-repair-820-2936-A-B/32645164137.html

Get 2 or more, no guarantee the SMC on those boards is good.....