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the Amp meter shows 20v- 0.06A
Resistance To Ground for the big coils:
L7030 = 292
L8410 = 1074
L7660 = 341
L3500 = 150
PPDCIN_G3H_CHGR = 20 V
PPVBAT_G3H_REG = 13 V
PPBUS_G3H = 13 V
PP5V_S4 = 0 Volt
PP3V3_S5 = 3.3 Volt
P3V3G3h = 4.9 V !!!!
3V0_G3H = 3 V
the macbook start normal untel i put the password stay 1 min and restart with black screen
if i turn it off and start it again the mac work normaly and after 1 min repeat the problem.
i change the pasta under the heatsink but nothing change.
i dont know from where can i start to measure in this...
LITTLE WATER ON U1950 AND U7701 EFTER CLEAN
I HAVE THIS MEASURMENT
FIRST COIL RESISTANT
L7130 112 ohm , L7520 424 ohm , L7560 3.7 ohm , L7630 115 ohm , L7310 11 ohm , L7320 12ohm
PPBUS_G3H 8.6 VOLT , PP3V42_G3H 3.4 VOLT ,
PP5V_S4 5VOLT , PP3V3_S5 3.3 VOLT
PM_BATLOW_L 0 VOLT (NOT ON)...
i changed the J8300 because there is short in all 5 capacitors C8300 and C7717/18/19/16
I Put Connector from A1466
but the short in the capacitors gone but the backlight problem not gone.
i made my measurements for Voltage on F7700 12 volt -- Q7706 (pin 3 LCDBKLT_EN_L11.7 volt -pin 4 12 v...
usb c Amp meter shows 20v - 0.05 to 20v-0.26 then 20v-0.01 mA efter 2 sec
PPbus_G3H 12.6 Volt
PP3V3_G3h 3.3 Volt
PP3V3_G3H_RTC_X 3.3 Volt
Voltage on L8410/D8410 0 Volt
PP3V3_S5 0 Volt
Voltage On L7030 changed quickly up and down
Resistance to ground on L7030 423 ohm
the fans spin and all the general voltage present but the
Voltages not present on:
the usb amp meter start from 20v , 0.23A then the amp goes to 0.01 then return back to 0.23
there is no picture and the capslock not light.
if i connect the battery the Amp goes to 2.9 A but...
i have 820-3437-B the fan start every 1 sec and stop then i try to clean it with brush and alkohol and iam sure no component missed
efter cleaning there is no green and orange light, i check this voltage and resistance...
pp3v3-s5-reg 0.36 volt
pp5_s4rs3 014 volt
pp3v42_g3h 3.4 volt
i have macbook pro A1708 with 1.2 volt on the fuse near U3200 and when i put usb amp meter the light flash without any reading
the 2nd usb c work good and the computer work good
i want to ask if i change the usb c port solve this problem.
I have 820-165 with water damaged there is 2 resistors 1k ohm missed from board ( R5283 and R5296) these voltage PP3V3_S0 , SMC_TOPBLK_SWP_L , PCH_STRP_TOPBLK_SWP_L on the 2 resistors.
is it reason for the computer too slow in installation system thanks
I changed logic board and the newboard cant detect ssd
i have external usb hd and when i put it in usb port with out booting from it the motherboard detect the ssd
and when i remove the usb drive the motherboard cant detect it again
i think something in the bios but i dont have idea to update...