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For the repair I only have i/o board with flex data and fan connect
R5170 is bad, change now I have SMC_ONOFF_L=3.39v but any led with charger genuine
neither power or fan in smc bypass mode
nice !! thanks only with reball SMC now I don't have short but I don't have led green or orange
new voltages
U5110
1 PP3V42_G3H=3.40v
3 PP3V42_G3H_SMC_SPVSR=3.40v
4 SMC_MANUAL_RST_L=2.71v
5 SMC_RESET_L=3.36v
6 SMC_LSOC_RST_L=3.38v
7 SMC_ONOFF_L=1.21v
8 PP3V3_S5_AVREF_SMC=3.26v
hi all, I have this board, connect power led1 green, pulse power button anything...
PM_PWRBTN_L=3.38v pulse SMC_ONOFF_L down to 0.10v
PM_SLP_S4_L=3.28v pulse power button same voltage no change
PM_SLP_S3_L=3.28v
SMCBAD ? thanks for all
I have injected voltage 2v with 0.04a nothing.. but up to 2,8v and the short to ground has disappeared, value to ground 160 change 340 change 160 10/15 second again short to ground.. value 019 mode diode and resistance now 21.4
Well, please excuse me, I was going to take these steps and suddenly the computer turned on (maybe because it was without any power supply all weekend)
The same thing happened to it about a year ago, but on that occasion it only took a day to work and we thought it was overheating.
Thank you...
hi all, I have this board with liquid damage, it has been cleaned and does not appear to have serious damage.
I have changed U5110 but without success because I have short to ground in PP3V42_G3H
Some measures
PP3V42=0.17V
PPBUS_G3H=0.22V
PP3V3_S0=0v
PP3V3_S5=0
hi i have this board with magsafe led green led orange but no power or fan spin. Either power in smc bypass mode
PPBUS_G3H = 8.53V
PP3V42_G3H = 3.39V
SMC_RESET_L = 3.36V
PP5V_S5 = 4,97V
PP5V_S0 = 0V
ALL_SYS_PWRGD = 0V
PP3V3_S5=3,26V
PP3V3_SUS=0V
U7501
23 = 8.53V
22 = 3.26V
12 = 3.39V
13=...
nice, it already works perfectly, third time's the charm...
bad luck three times damaged IC from different logic boards
Thank you and sorry for causing so many problems
U5110
1 PP3V42_G3H= 3,39v
3 PP3V42_G3H_SMC_SPVSR=3,39v
4 SMC_MANUAL_RST_L=2,74v
5 SMC_RESET_L=3,33v
6 SMC_LSOC_RST_L=3,38v
7 SMC_ONOFF_L=3,38v
8 PP3V3_S5_AVREF_SMC= -0,13 (Using the positive tip of the multimeter the negative symbol appears)
hi guys ! I have this board with some liquid damage in the image area. I have purchased and the components seem to be fine but the equipment does not turn on, nor is it detected in DFU. With the right USB ports you don't have either
Any idea where I start? What measures do they need?
thank you...