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sorry no I have 3,3V on pin 9 and 0V on pin 10.
I check that for the pin 10:
PM_EN_REG_GPU_VDDQ_S0 = 3,3V
PM_PGOOD_REG_FBVDDQ_S0 = PM_PGOOD_REG_FBVDDQ_S0 = 0V
I change U7750 but always same
i have this board 820-3478 (clean), only 1 led with iMac supply.
I use an external power supply, I inject 12V on PP12V_ACDC, the current is 0,77A
I think it's too much, I have U2800 is very hot, PP1V05_TBTLC=0,3V, I suspect U2800. PP3V3_TBTLC=3,3V.
have you an idea?
i contact you for this mac, the board is very clean. The mac no charge (the tester stay black, no power)
i find D3300 and D3400 short, i change it and after it work well. i think it's good but, the customer come back, D3400 is short again.
i find the mac is very slow for change 5V to 20V...
I change U5110 and R5100, sometimes the SMC_RESET_L come to 3,3V and the mac start normally.
I try to remove R7100 but same, i have SMC_RESET_L=1,4V
When i remove U5110 and R7100, i have fluctuant from 1,4v to 2,8V on SMC_RESET_L
ok i change the board and now i have the green led but nothing.
SMC_MANUAL_RST_L=2,8V strange no?
maybe it's U5110? or SMC?
no the board don't turn on.
i have just the board and the magsafe board. i haven't green led, i don't connect the battery, it's easier to measure voltage on board.
SCL/SDA lines at 0V, SCL/SDA=0,5V in diode mode
the customer close the mac open for the night and the morning nothing, the mac...
i have this board very clean, no green led (PSU and official charger)
DCIN_ISOL_GATE = 6,8V
PP18V5_DCIN_ISOL = 18,5V
R7012 = 68Kohm