820-3209 no power

[Mamdouh]

This board was liquid damaged cleaned with ultrasonic. PPBUS_G3H is at 8.2v
3v4_g3h 3.4
smc reset 3.4
smc onoff 3.4
ppvrtc 3.4

Testing with good audio board and cable, any advice? thanks

 

[2informaticos]

SMC doesn't work properly, or there is a problem on I2C battery bus.
I recommend to start reballing SMC.

Just in case, check diode mode and voltage at SCL/SDA lines of mentioned bus.

 

[Mamdouh]

Diode mode on sda line was different than scleras, ultrasonic again was able to get me 8.4 on PPBUS, now an all_sys_pwrgd issue i think all_sys_pwrgd measures 0v. Q7950 has all 4 voltages present, and the 6 parent lines of the pgood signals supplied by 3v3_s0 are present, how would i go about checking if these lines are making the pgood signals for example if i have 1v8_s0 how would i know if 1v8_s0_pgood is present since all the pgood signals measure 0v,

 

[Mamdouh]

than scl line*

 

[Mamdouh]

so replaced u7100 and connected c7103 and r7147 since the test point was corroded, board does boot now but takes 300ma (20watts) that seems a bit high, it should be fine as long as it boots?

 

[Mamdouh]

was just some corroded test points this is solved thank you