820-00138 High Fans

Ryanlen2

New member
Hi, I have a liquid damaged 820-0138 with hi fans. The damage is minor and directly was found on R5381. G3_Poweron_L pad was burnt off the board as well. i have so far ran a wire from G3_Poweron_L to its test point next to R5172. SMBUS_SMC_5_G3_SCL is fluctuating from 3.42 - 3.20V. Replaced R5381 and reballed the original SMC and ISL. Diode mode on SMBUS is .510 and Diode on G3_Poweron_L is .728. Fans are still high with no other signs of liquid. Should I try another SMC? Any advice would be appreciated.

Thanks!
 
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2informaticos

Administrator
Staff member
Try known good trackpad and flex first.
SCL/SDA linees of battery bus should measure less than 1% difference to ground, on diode mode.
If battery is recognized and charging, that bus is OK.
 

Ryanlen2

New member
Thanks.

Q5410

Pin 1 - 0
Pin 2 - 3.323V
Pin 3 -17.04V
Pin 4 -17.06V
Pin 5 - 0.003V
Pin 6 -0.003V
 
Last edited:

2informaticos

Administrator
Staff member
Pin 5 should be aprox 8.5V; hoewever, pin 3 is correct.
Post SMC_DCIN_VSENSE value.
Check for corrosion on that trace...
 
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