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no i haven't 5V at L3500. i find the problem, i have 3 resistors bad (RB701,RB706,R3506 100ohm instead of 2,2ohm). i change the three and the usb port work with external hard drive. thanks for your help.

i try a hd external usbc is same, not work. I think it work on one way. Do you have ever see that?

my hub work on a good mac and the hub of my customer don't work too.

yes all four port work to charge the macbook pro. yes i have always 20V all usbc without battery but never the 5V for old usb.

no the mouse and pendrive not work, and i try a tester USB3 i haven't 5V. i try on a good know macbook pro, i can see the 5V on the tester.

Hi, i have this board with a problem with external Hard drive, no power for external hard drive. I have a tester for usbc port, the power supply charge the battery (20V 1-2A). but nothing for external hard drive. i don't understand why it work only in one way. The motherboard contact with liquid...

ok i understand. do you think the display is burn too? thanks

No it's not backlight rail burn, it's EDP_INT_AUX_N burn, i check all PM_SLP_Sx it's all at 3,3V my friend have the same mac, it work on external display. i don't understand why you say "No dedicated GPU, so external video missing too"

Hi, i have this board with liquid spill near U7100, i change C7100 and R7100 now the board seems start but no display ALL_SYS_PWRGD is OK. i haven't noise (dong) when i plug power cord but i have 20V and between 1and 2A. the display cable is burn, i change it. i'm afraid the display is dead...

i check with this board for help but U1930 is unmount (i verify on a donor board, no component on U1930) I can't find R1930 :-(

where is it? In the boardview of 820-00138, R1930 & U1930 is not present.

CPU_PWRGD = 0V, PP1V05_S0_CPU_VCCST=1,05V, CPU_VCCST_PWRGD= 0V U1100 is dead? i don't understand if it's U1100 who make the CPU_PWRGD signal or U1930 for CPU_VCCST_PWRGD. can i jump R1800 to 1,05V?

i use an tektronix tbs 1102B and i don't see anything on PM_SLP_S4_L. Garbage or try to change U1800 by donor? thanks

PM_PCH_PWROK = U1950/pin 5 = 3,4V R1947 is good 0ohm XDP_CPU_VCCST_PWRGD = 0V on R1800, maybe U1930 but can't find it PP1V05_S0_CPU_VCCST = 1,05V

sorry i copy just a start sequence find on a website. PM_PWRBTN_L fall when i short SMC_ONOFF_L, i tell you on previous message :)

PM_PCH_SYS_PWROK = 3,41V i don't find the signal PM_PCH_PWROK because my board file is not the same like 820-00138 board. do you have the good brd file? where can find it? on vinafix is not good. thanks

do you try on external display?

finally i check power sequence like this example G3H/RTC rails + 32kHz RTC clock → {SRTCRST, RTCRST, INTVRMEN, INTRUDER#, DSWVRMEN} → S5 rails → S5_PWRGD → DPWROK → SLP_SUS# → SUS rails → RSMRST# → BATLOW# → PWRBTN# → SLP_S5# → SLP_S4# Some signal are not present on this board. all seems good...

Hi, this board is clean no liquid spill, the customer say, the mac make beep memory after an install system. Now I have just fan spin, no chime and no display. i make this measure: PPBUS_G3H 12.8v SMC_ADAPTER_EN 3.38v PM_BATLOW_L 3.3v ALL_SYS_PWRGD 3.38v PM_DSW_PWRGD 3,4v PM_MEM_PWRGD 0,8V...

ok i have no pulse on all PM_SLP_Sx_L. i think it's power sequence problem. I try to find it this day. i have a question for power supply, can i use a external power supply and apply 12V on the board? without the real supply because it's hard to check signal on the iMac. thanks