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PPBUS_G3H =8.17 only Q7130 changed U7100 chasnged SMC reballed SMC_BC_ACOK =3.3v LIO board cable both changed

why CHGR_EN_MVR 0v . no PP3V3_G3H_RTC_X. PPBUS_HS_3V3G3HRTC_X=5v. AUX_DET=1.7v CSOP CSON CSIN CSIP =all 5v VDDA ,VDDP=5v

Board turns on comes caps lock working but no display no LCD 5V no backlight no gpu core no gpu vram volt

PPBUS -0.9v U5200: P_IN = 5.171V AUX_DET = 1.6V VDD = 5.084V VDDP = 5.082V AUX_OK = 0.001V AMON = 0.009V BMON = 0.001 PPBUS_AON and 3V8_AON -0v

dfu error

820-01041 PP20V USB C -OK PPBUS G3H -OK PP3V3 G3H - pulsing ALL SLP /WAKE VOLTAGES also pulsing geting into DFU

hi have a doubt ,actually how Mac safe adapter outs voltage when plugging in and how dc in voltage generates can u please explain . thank you

neat and clean mb all rails comes fan spins for seconds and repeats PLT RESET also same tried BIOS / Tried without Q7950 all same

820-00165 single pulsing only 3V3S5 Stable VCORE also just comes 0.080v and goes checked u1950 /U1930 /Q8150 SPI CS L also just spikes when I remove R8185 or R8111 either DDRS3 or PP1V05 S0 Not present but other voltages remains stable (no vcore) what may be the issue

PP3V3_S5_SMC_VDDA. ok SMC_RESET_L. ok SMC_CLK32K not stable PP1V2_S5_SMC_VDDC. ok SMC_PM_G2_EN. pulsing PP3V3_S5 pulsing PBUS_G3H 12 v ok all other voltages after 3v3 s5 also just pulsing

where the MacBook m1's serial number stored

ALL_SYS_PWRGD -3.3v ok

not power on board power up to s0 voltage found no voltage at PPCPUVCCIO_S0_REG changed u7600 but no output CPUVCCIOS0_EN = 3.3v PP5V_S0_CPUVCCIOS0= 5v CPUVCCIOS0_PGOOD- R7964 removed but still no result

power PP20V_USBC_XA_VBUS stuck at 5 volt PPDCIN_G3H cycling between 5v to 4.6 v PPBUS_G3H cycling 12v and then 0 volt PP3V3_G3H_RTC cycling between 2 v to 2.7 volt

UB400 -all LDOs except PP1V1 UPC TB LDO BMC UB300 -all LDO s ok U3100-all LDO s ok U3200-all LDO s ok

came dead 3v42 g3h missing when heating around u7090 outs 3v42 g3h and board works fine but after some time 3v42 g3h drops to 1.8 something and board shuts off changed u7090 ,L7095,R7095,R7096,C7094,C7095 but result is same after some time drops 3v42g3h I changed resistor by equation...

can you tell me what is SMC_EXTAL and SMC_XTAL also can I measure 12mhz using dso

All volt voltages after power button just pulsing. g3h bus = 8v constant pp3v3 s5 = 3.3v constant 5v s4 = goes to 5 then drops s3 voltages same s0 same v core =jumbs to 1.7 and drops all these voltages just comes for seconds of time also PLT RST comes 3.3v and drops

need board view file