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820-01598 - No display 20V 1.6amp on battery

R

ronaldo

Member
Hi. I need help with this LB.
Mac CPU gets mad hot while on battery, trackpad clicking.
LB stand alone gets 20V and current draw varies between 0.05 ~ 0.1 amps and stabilize at 0.04amps.
CPU gets hot just when battery is plugged in.
Standalone it does not turn on.

All the coils measurements are ok according to a good LB.

All this power lines has the correct voltage.

PBUS
PP3V3_G3H_RTC
PP3V3_G3H
PP1V8_SLPS2R
PMU_CLK32K_SOC
PP1V8_AWAKE
PP1V8_SLPS2R_PMUGPIO
PP1V1_SLPS2R
PP0V8_SLPS2R
PP0V82_SLPDDR
PP3V3_AWAKE
PPVDDCPUSRAM_AWAKE
PP0V9_SLPDDR
PP1V1_SLPDDR_SOCFET_EN
PP1V1_SLPDDR
H9M_24MHz_CLK
PP1V2_AWAKE
PPVDDCPU_AWAKE
PMU_SYS_ALIVE (Except this one that cycles from 1.77V to oV every 21 seconds)
PMU_ACTIVE_READY
PMU_COLD_RESET_L

Any help would be amazing.
Thanks
 
R

ronaldo

Member
The PP2V5_NAND_SSD0, PP0V9_SSD0 and PP1V8_IO_SSD0are not cycling.
I forgot to mention that I've tried Revive and it gone trough all the process with no errors.
Is there any way to make sure the SSD is the problem.
 
R

ronaldo

Member
PPVIN_S0SW_LCDBKLT - 0V
PP5V_G3S - 5.11
PP3V3_G3H - 3.31
CHGR_LX1 - 12.63
CPUGT_SW1 - 0
PVCCEDRAM_PHASE - 1.02
PVCCEDRAM_PHASE - 0
PPVCC_CPU_PH1 - 0.81
PPVCC_CPU_PH2 - 0.81
PPVCCSA_CPU_R - 1.02
PP0V95_S0_CPUVCCIO_REG_R - 0.95
P1V2_PHASE - 1.20
PP2V5_NAND_SSD0 - 2.52

None of then are cycling.
Tested with another display and nothing.
 
2informaticos

2informaticos

Administrator
Staff member
So you get even CPU core voltage.
I don't have any working board to check the correct value.
But your reading doesn't look bad; 0.8V can be good enough.

Check USB activity, at least.
 
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