820-00165-02

pcfriends

New member
hi guys I have a MacBook air board , with water damage after ultrasonic , I did the rail tests and PPBUS_G3H was with short to ground I inyect voltage on the line and nothing got hot , then I remove R5450 and the short on PPBUS_G3H gone , but , still PPBUS_S5_HS_COMPUTING_ISNS was with short I apply voltage to that line now and nothing got hot , after removing components 1 by 1 : Q7310 was shorting PPBUS_S5_HS_COMPUTING_ISNS to ground , I replace it , and I try to power on , nothing , now here is what I currently have on my board:

PPBUS_G3H : IS PRESENT
PPBUS_S5_HS_COMPUTING_ISNS :pRESENT
GREEN LIGHT : YES
PP5V_S5: PRESENT
PP3V3_S5: PRESENT
PPVRTC_G3H: PRESENT

What rails I should see now?

S0 rails : Not present
PM_SLP_S3_L: not present I read on R8178 0v Next step?

ORIGINAL WATER DAMAGE:

U7200
U5620
U7310
U7840
 

dukefawks

Administrator
Q7310 was shorted so full PPBUS voltage came on to the CPU. I bet the CPU Vcore is shorted, so dead CPU. The end.....
 
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