Recent content by ajdoc

Yes, board alone Affect areas: UP800 (removed at the moment because there was short on PP5V_S2_MAIN UD770, C7702, QP700, U5700, UD500, C5150, UR200, R8170, R1983, CE412, UE022

Board with liquid damage. PPBUS_AON = 12.29V PP3V8_AON = 3.78V PP5V_S2 = 0V (pulsing) PP1V8_S2SW = 0V (pulsing) PP1V8_S2 = 0V (pulsing) PP1V2_AWAKE = 0V (pulsing) PP1V2_S2 = 0V (pulsing) PP0V95_S2SW_VDD2L = 0V (pulsing) PP0V855_S2SW_VDDCIO = 0V PPVDD_ECPU_AWAKE = 0V PPVDD_DISP_AWAKESW = 0V...

Quick update. All works fine with new U8100

Cant see any corrosion. PPBUS_AON 12.19V 3V8_AON 3.79V Both CD3217 have correct diode mode values and voltage. Any idea?

Board had small liquid damage on C8101 (PPBUS was shorted, replaced cap and there is no short). U7210/30 are affected by liquid as well. Detected in DFU and restore done without any errors. No chime, no light on caps lock. Board only connected to charger have 20V and 0.08A (CPU get lettile...

Cant find and corrosion on the board. At the start I had 5V from charger. Tried to "revive" in DFU and had error 21. Tried restore and had error 4014. I reflashed SoC ROM and have 20V from charger but still cant restore it. Error 4014. Looks like faulty NAND?

G3S voltage are present in off state when on charger only and when on battery only. I dont have good board around me at the moment. I have similar board which is working fine 820-00923. Is G3S line like S5 or S4 state?

Cant find any corrosion on the board. Tried three batteries and on all of them have the issue. Mac drain battery when in sleep or even turned off. In the evening battery level around 60% and in ther morning battery is 0%. Same issue will three batteries. I removed the board, connected battery...

At the end I replaced just in case U6855, Q6861, U6860, Q6862 and keyboard and trackpad works fine now.

I check a few 00850 donor boards and on all of them they are not connected.

No problem. Thank you for all help - learned something new.

No luck. When checking voltage to J6701 do I need do it with connecter trackpad? Found something strange near U6860 R6871/1 have 3.3V but R6870 have 0V and have short (0.001 in diode mode) on R6870/1. How is that possible? Thats the same line which have R6871/1 which have correct voltage? Can...

Changed U7800 twice, and same issue. All voltage did not change. My another idea was to re-flash U2890. When shield was removed there saw bad corrosion on U2890. Re-flashed it and same issue. Replaced and re-flashed another U2890 and still the same issue. There is tiny hot spot on U7800 every...

Customer tried replace battery on his own. I found one of the UB400 had short on PP3V3_UPC_TB_LDO. Replaced UB400 and it boot now but no KBD/TPAD Tried with known good TPAD with flex and same issue. I found there was no diode mode readings on J6701/17 (TPAD_3V3_SPI_EN). Replaced U6855 and...

PMU_VDD_HI 3.40V