820-01958 DFU ok but not boot

raainxx

Member
Hi,
this board clean (no liquid), I can restore in DFU the Mac and finish the restore without any error but nothing on the display.

PP1V2_AWAKE 1.2V
PP1V8_AWAKE 1.8V
PP3V3_AWAKE 3.3v
PPVDDCPU_AWAKE 0.755v
PPVDDCPUSRAM_AWAKE 0.802v
PP0V8_SLPS2R 0.800v
PP1V8_SLPS2R 1.8v
PP1V25_SLPS2R_SMC_AVREF 1,2v
PP1V1_SLPS2R 1.1v
PP1V8_G3S = 1,8V
PP5V_G3S=5V
PPBUS_G3=12,6V
PP0V9_SSD0=0,9V
PPVCC_NAND_SSD0=2,5V
PPBUS_G3H_SSD0 = 12,6V

i test all the Mac with another logic board, work normally. I test the logic board just with display and I/O board, nothing on display.
No short on big coil.
what can I do? CPU failed?

thanks
Best regards
 

raainxx

Member
No I haven't cpu core voltage, no USB activity.
PPVCC_CPU_PH1=PPVCC_CPU_PH2=PPVCC_CPU_PH3=0
VCCINAUX_R=1,8V
trackpad force touch work
thanks
 
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