a1279 820-2610

[tili1988]

hi have i have 1 problem i don't have pp5v_s0
sometimes it turns on the mac fans are too strong when the meto the card in the mac nothing starts. example on c7560 and always present 8v

 

[tili1988]

who generates the pp5v_s0

 

[Vogelek23]

who generates the pp5v_s0

This voltage comes from U7500 controller, =PP5V_S0_REG voltage rails (L7510 inductor). Check LDO output (pin 7) , EN1 enable input (pin 14), VBST1 voltage (pin 17) and VIN (pin 6). Do you have any voltage to ground on =PPMCPCORE_S0_REG (L7560 inductor) at the same time? What is the resistance to ground on L7510?