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  1. it-solve

    SOLVED: 820-01700 - 20V 0.17A after liquid damage. Short on PP*_SLPDDR & Heat signature on T2

    Hi Guys, this A2141 820-01700 came with liquid damage on 2 spots only: C6466/6452 - PPBUS_G3H_SPKRPAML - 12.6V - 0.39 C9580 - PPBUS_g3H_SSD0_SNS - 12.6V - 0.39 The only short I located apart from than CPU Phase lines is on PP0V9_SLPDDR - 0.049 PP0V82_SLPDDR - 0.032 PPVDCPU_AWAKE - 0.010 There...
  2. it-solve

    820-00281-A Critical Software Update failed to install

    Passes all Apple diagnostic tests. Geniuses said its a faulty TouchBar Tried most of these - https://repair.wiki/w/A1706_2016-2017_13”_Touchbar_MacBook_Pro Disconnected the Touchbar as it was showing only yellowish background Wiped the drive and reinstalled High Sierra - It installed properly...
  3. it-solve

    820-00165 no PM_SLP_S5_L pulls 0.06A

    This board is a return case with liquid damage from 2 years ago. Not sure if related. Stoped turning on, Seems like a screw got loose and got stuck between the GND of C7323 and the fan connector, Probably not related as well. Cant measure any direct shorts anywhere. All voltages until...
  4. it-solve

    SOLVED: A1706 820-00239 - USBC's not detecting USB nor providing Video Output, but charging - Liquid Damaged

    A1706 820-00239 which had extensive liquid damage. Located and removed the short on PPBUS_G3H. Now turns on, charging and works fine. Passes Apple Diagnostic. The only issue seems to be not USB and HDMI output via either of USBCs. No light on a USB drive. Tried SMC reset. Another strange thing...
  5. it-solve

    A2442 820-02098 5V 0.25A -> 0.05A Blown CD3217 and TPS62180 ELC180

    Go this A2442 820-02098 with liquid damage. Visible damage with a burn mark on CD3217 closer to the HDMI. Shorting LDO's. Shorts gone with removed CD3217 Visible blown TPS62180 ELC180. When removed short persists between two phases Initially would stay on 5V 0.25A via the Magsafe3 With...
  6. it-solve

    820-01521-02 - 5V 0.43A - No liquid damage - U7800 warms up

    Tried DFU mode but did not get picked up. Under IR U7800 seems to warm up to 34*C No visible shorts on coils, low impedance on P0V9SLPDDR_SW0 - 53Ohm P0V9SLPDDR_SW1 - 53Ohm While P1V1SLPS2R_SW0 - 8.9kOhm P1V1SLPS2R_SW1 - 11kOhm Lifted up L7186/Lt187 low impedance seems to be on the...
  7. it-solve

    820-02020 Short between PP3V8_AON_MPMU_ISNS_VIN <->PPVDD_PCPU_AWAKE. U8100 dead?

    Hi Guys, this board had liquid damage after cleaning and removal of a bunch of burned PP3V8_AON_MPMU_ISNS_VIN filter caps, it turned on. But now it's stuck at 5V 0.01A and I measure short (0.55Ohm) between C81D7 and C81H1. Seems to be in/out of the U8100. Anything else I can do? I have a...
  8. it-solve

    A1297 takes 9 hours to charge to 100%

    Hi Guys, An interesting case here. A1297 takes about 9 hours to charge the new battery completely. The previous battery which was replaced (less than 6 months ago) also had a similar issue where it took longer to charge. Then suddenly stop charging and drained to 0%. With the replaced battery...
  9. it-solve

    820-00840 Camera not detected - liquid damage

    Slight liquid damage, after clean all working fine except the camera. Diagnostic says there may be an issue with the camera. Not sure if that means detected by problematic signals or not detected at all. Not detected under System Report PP5V_S0_ALSCAM - 5.1V PP5V_S0_ALSCAM/PP5V_S0_ALSCAM_F -...
  10. it-solve

    820-00840 20V, 0.04A after liquid damage

    SMC bypass - no response All voltages steady PPBUS_G3H - 13V PP5V_S5 - 0V PP3V3_S5 - 0V PP3V3_G3H - 3.41V PM_BATLOW_L - 0V Slight corrosion around: U7210/20, R3702, C3700 Quite a corrosion between U2890 and U3770, also U8440 All coils diode modes seem ok, comparing to a working board. Apart...
  11. it-solve

    FlexBV vs XinZhiZao vs ?

    The current change of board view format of 820-02020 to be compatible only with the paid version of FlexBV, seems to require techs to purchase a license. While looking for alternatives I have noticed XinZhiZao being an interesting subscription-based alternative for gathering not only...
  12. it-solve

    820-02020 Liquid damage - short on PPBUS_AON.

    Just got this in today with liquid damage. When connected to the charger with a battery it gets 5V 0.33A and the Apple chips get very hot. Noticed it has a short on PPBUS_AON with removed F5200. Seems like will have to buy FlexBV to be able to go through the board view. Where shall I start? Is...
  13. it-solve

    820-01041 - 5V 0.1/0.4A - PP3V3_UPC_TA/B_LDO short

    Hi, I am dealing with this 820-01041, which gets 5V 0.1A on one set of USB-C chips UB300/400 (these had liquid residue all around them) and 5V 0.44A U3100/3200 on the other set. UB300 - PP3V3_UPC_TA_LDO - short - 0.0125Vdc UB400 - PP3V3_UPC_TB_LDO - short - 0.0130Vdc Shall I measure something...
  14. it-solve

    SOLVED: 820-4924-A P5VS0_EN/PM_SLP_S5_L pulsing

    A1502 board with quite of heavy corrosion on this area PP3V42_G3H 3.4V3 PP5VS0_FET- 0 -2.3V pulsing P5VS0_EN- 0 -1.6V pulsing CHRG_VREFQ - 3.33V - 0V pulsing PP3V3_S0 - 0.08V u7100 PP5V1_CHRG_VDD - 5.12V PP3V42_G3H_CHGR - 3.43V PPBUS_G3H - 12.56 - 12.33V power cycles SMC_ADAPTER_EN - 3.40V...
  15. it-solve

    A2159 820-01598 Stuck on 5V looping on both ports, with pulsing heat on U3200

    I got this A2159 820-01598, which have looping 5V 0.3A on the charger. U3200 shows a pulsing heat signature on both charging ports. While PP3V3_UPC_XB_LDO is shorting. PP3V3_UPC_XA_LDO shows 0.5Vdc. I don't see any liquid damage on the board itself, only the bottom of the battery sensors...
  16. it-solve

    A1932 820-01521 20V 0.07A after liquid damage

    I got this 820-01521, which had liquid damage—no major corrosion on the board, some around CC788/9 and CC8A1. I can see slight heat dissipation from the T2 security chip. PPVIN_G3H_P5VG3S - 12.63V PPBUS_G3H - 12.62V PP3V3_G3H - 3.25V PP5V_G3S - 0V - 0.42Vdc CHGR_PHASE1 - 12.40V Where shall I...
  17. it-solve

    820-00165 No Backlight

    A beer damage board turns on with no backlight. Tried SMC reset, capslock is active and there is USB activity The backlight blinks for a second once when turns on. D7701 - 8.6v both sides XW7720 - 8.6v and clean BKL_EN - 2.83v BKL_PWM - 0v All Return resistors 0.6Vdc Removed R7704 and tied...
  18. it-solve

    SOLVED: 820-3332 Black screen with chime and loud fans. No liquid, but very dusty. GPU?

    Hi Guys, came across to 820-3332 which turns on and chimes, but no screen neither internal nor external. No Capslock response either. No liquid damage, but very dusty and must have been overheating for a while. Not sure if its GPU issue or something else I should look for. CPU/GPU gets very...
  19. it-solve

    SOLVED: 820-4924 - Works all fine but no fan - SMC_FAN_0_CTL missing

    Hi Guys, I have this board which had liquid damage and shorted Q7010. Now is on and loading os, but the fan is not spinning and cannot detect any RPM, when measured: PP3V3_S0_FAN - 3.3V PP5V_S0_FAN - 3.3V SMC_FAN_0_TACH - 3.3V SMC_FAN_0_CTL - 0V - comes straight from underneath SMC. No...
  20. it-solve

    820-00840 - NO PP3V3/5V_S5 - 20V/0.04A - PP3V3_S5 Shorting

    Got this board with small amount of liquid damage around U7650, a quite similar case to @CRC2018 - 820-00840-a Wont start missing PP5V_S5 Another area which had some liquid damage was C3403, which seems a bit corroded but still makes good contact. PP3V3_G3H - 3.3V PP5V_S5 - 0V - 0.43Vdc...
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