820-00244 NO PBUS, not shorted.

[BCN_Techs]

Got this board with U3100 burnt. Replaced it (twice because was thinking that may be first was deffective) With exactly same (B01 at the end) and now getting 5V, no amps. No PPBUS but not shorted to ground. All other rail except PPVIN_G3H seems be ok.

 

[2informaticos]

Post voltage of all LDO outputs of U3100.
Do you get 3V3_G3H and SMC_RESET_L?

 

[BCN_Techs]

PP1V8D_UPC_XA_LDO - 1.8V
PP1V8A_UPC_XA_LDO - 1.8V
PP3V3_UPC_XA_LDO - 3.3V

PP1V1_UPC_XA_LDO_BMC - 0V (not shorted)

PP3V3_G3H - 0V (not shorted)

SMC_RESET_L 0V

 

[BCN_Techs]

any idea?

My guess is U7000 but as it must be picked up from donor board that i dont have, before buying donor i want to be sure if you think same.

 

[2informaticos]

Check basic voltages of U7000; P_IN, ACIN, VDDA/P, VR_AON.
Do you get voltage at R7020?

 

[BCN_Techs]

LDO from u3100 are ok?


" PP1V1_UPC_XA_LDO_BMC - 0V (not shorted) " is that ok?

 

[2informaticos]

Not normal, but you must check for voltage at R7020.
If there is voltage, U7000 is suspect too; may not worth the repair then...