820-2879 no green light

Yoel Ren

Member
Pp3v42 3.4v
Smc_bc_acok and acok_vcc 3.3v
Adapter_sense 3v
Smc_reset_l 3.4v
Board looks pretty clean
Resistance to ground on pp3v42_g3h 8.9k ohm, i have tried changing smc 3 times, but i don’t know if its the smc or another problem..
 

Yoel Ren

Member
U6900 pin 1 : 3.3v
4 : 3.3v
5 : 3.3v
Continuity on Pin 5 j6900 to u6900 pin 5 is good
Continuity on u6900 pin 5 to ball 96 of smc is good too
 

2informaticos

Administrator
Staff member
"Continuity on Pin 5 j6900 to u6900 pin 5 is good "
To the central pin of Magsafe, in the DCIN board...
 

2informaticos

Administrator
Staff member
Try another charger, origi nal.
If still no light, bad SMC, or solders; if DCIN board is really good.

BTW, exact PPBUS_G3H voltage?
 
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