Bouba148
New member
WD, passed in the UC
2 Quarter Fan Spin
No green Light
PPBUS_G3H: 8.19V U7100 not talking to SMC
PP3V42: 3.415V
PPVRTC_GH: 3.328V
PP5V_S5: 4.987V
PP5V_S4RS3: 0V
CPUVCore, Pins 7 & 3 of U1950 twice too
Able to read SPI Rom, and doesn't look corrupted.
Checked all SPI Bus Series Termination resistors and traces: OK
R17/18: 3.4 Ohms
R27/28: 20.5 Ohms
SMC_TDI and SMC_TCK shorted to GND under SMC
reflowed SMC: fan was spinning at full speed then stopped after 2-3 minutes but still SMC_TDI and SMC_TCK shorted to GND.
Waited turned off and on then came back to 2 quarter fan spin.
When I put my probe on PM_DSW_PWRGD at R1451 the fan does a quarter spin, this rail is directely connected to the SMC
Before removing SMC for reballing any suggestion?
2 Quarter Fan Spin
No green Light
PPBUS_G3H: 8.19V U7100 not talking to SMC
PP3V42: 3.415V
PPVRTC_GH: 3.328V
PP5V_S5: 4.987V
PP5V_S4RS3: 0V
CPUVCore, Pins 7 & 3 of U1950 twice too
Able to read SPI Rom, and doesn't look corrupted.
Checked all SPI Bus Series Termination resistors and traces: OK
R17/18: 3.4 Ohms
R27/28: 20.5 Ohms
SMC_TDI and SMC_TCK shorted to GND under SMC
reflowed SMC: fan was spinning at full speed then stopped after 2-3 minutes but still SMC_TDI and SMC_TCK shorted to GND.
Waited turned off and on then came back to 2 quarter fan spin.
When I put my probe on PM_DSW_PWRGD at R1451 the fan does a quarter spin, this rail is directely connected to the SMC
Before removing SMC for reballing any suggestion?