[SOLVED]820-00165 no fan spin but has magsafe

nik1981

Member
Hi all, I have another 820-00165 with no fan spin after liquid damage. Traces of liquid near SMC, U7701 and U3210.

Ultrasonic cleaned, jump wire from C3286 pin 1 to pin 18 of U3210 as the test point between them had nearly vanished.

U7701 removed and replaced as it looked bad and I couldn't guarantee there wasn't crap under it.

SMC had a bit of a reflow to see if it changed anything.

PPBUS_G3H = 8.59v
PP5V_S5 = 5.04v
PP3v3_S5 = 3.33v
PM_SLP_S4_L = 0v
SMC_PM_G2_EN = 3.42v

Any ideas before I remove the SMC to take a look under there?
 

JohnB8812

New member
This could be anything. PPVRTC_G3H present? Upload picture of BIOS area, U1950 area, and hopefully you removed JTAG.
 

nik1981

Member
No Title

Yeah, PPVRTC_G3H is 3.33v at C1910. Excuse the photo, I had to take a picture of the screen with my phone..lol
 

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nik1981

Member
This is a 2017 Mac, purchased 6 weeks ago. Wine spilt on the table and some splashed in the rear vent apparently.
 

nik1981

Member
for PM_DSW_PWRGD I get 0v on R1451 pin 1.
for PP3v3_SUS I get 0v on C1204 and U6100.

R1300 pin1 = 3.33v - pin2 = 3.33v
R1301 pin1 = 3.33v - pin2 = 2.99v
R1302 pin1 = 3.33v - pin2 = 3.21v
R1303 pin1 = 3.33v - pin2 = 3.32v
 

JohnB8812

New member
Ok PP3v3_SUS missing and PM_DSW_PWRGD missing is no good. Resistance to ground on PP3v3_SUS? Missing DSW PWRGD means either corrosion under the SMC or bad SMC.
 

nik1981

Member
PPBUS is exactly 8.6v - PM_SLP_S4_L jumps to 3.3v about 3 seconds after connecting the charger but doesnt do it again until you unplug and plug back in
 

nik1981

Member
PPVCC_S0_CPU is jumping to 3.3v also, it does it twice. The other may do it twice also but I might have missed the first one.
 
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