820-3662 no green led

raainxx

Member
Hi,
i have this board 820-3662 who don't want to boot, I change already because U7190 is short (hole black on the component), I change too U7100, R7101.
Now I have PPBUS_G3H, Clean board, no liquid.
PP3v3_S5 and PP5v_S5 are present.
Missing PM_SLP_S5_L and SMC_S4_WAKESRC_EN which are required to enable S4 rails.

ppbus_g3h = 12.57
PP3V42_G3H = 3.42
PPVRTC_G3H = 3.34
PP5V_S5 = 5.04
PP5V_S4 = 0v no short
pp5v_s3 = 0v no short
pp5v_s0 - 0v no short
pp3v3_s5 = 3.34v
pp3v3_s4 = 0v no short
pp3v3_s3 = 0v no short
pp3v3_s0 = 0v no short
pp3v3_sus = 3.34
PM_SYSRST_L = 0v
PM_BATLOW_L = 0v
PM_PWRBTN_L = 3.42
PM_RSMRST_L = 3,29v
PM_SLP_SUS_L = 3.4v
SMC_ADAPTER_EN = 3.4v
SMC_PM_G2_EN = 1,15v not normal?
SMC_S4_WAKESRC_EN = 0v
PM_SLP_S5_L = 0v
PM_PCH_SYS_PWROK = 0v
PM_PCH_PWROK = 0v
PM_DSW_PWRGD = 3,4v
PCH_DSWVRMEN = 3,23v
 

raainxx

Member
YEs 0V, I haven't the battery, only the logic board.
No it's an original magsafe 1 85W with original adapter. Is not good?
thanks

edit: I try with an original magsafe 2 85W, always no led.
 
Last edited:

2informaticos

Administrator
Staff member
Then PCH will not start power on sequence.

SMC_PM_G2_EN still so low?
Be sure to measure properly; is strange that 3V3_S5 is enabled with so low signal.

Post U7000/1 voltages.
Did you try known good DCIN board?
 
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