820-3476-a orange light not turning on

Sr. Robot

Member
Hi, got an 820-3476-a no signs of corrosion. No turn on on SMC bypass

PPBUS_G3H: 12.5v

PP3V42_G3H: 3.4v

PP5V_S5: 5v

PP5V_S4: 0v

PP5V_S0: 0v

PP3V3_S5: 3.3v

PP3V3_S4: 0v

PP3V3_SUS: 0v

PP3V3_S3: 0v

PP3V3_S0:0v

PP1V5_S0: 0v
 

2informaticos

Administrator
Staff member
Don't waste time checking for S4 voltage, if don't get SUS voltage before.
And of course, no reason to search for S3 at all.

Be sure to use original 60/85W Magsafe 2 charger.
Check PM_DSW_PWRGD, PCH_DSWVRMEN, PM_BATLOW_L and all PCH's RTC signals.
 

Sr. Robot

Member
Yes, im using an 85W oem charger.

PM_DSW_PWRGD: 1.3v

PCH_DSWVRMEN: 0.429v

PM_BATLOW_L: 3.3v

PPVRTC_G3H: 0.429 v

PCH_CLK32K_RTCX1: 0.42v

PPVOUT_S0_PCH_DCPRTC: 0v

PCH_SRTCRST_L: 0.46v

RTC_RESET_L: 0.425v
 
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