820-00928 a1707 no power got 20v with 1.44amp to 3.++amp

hello got this a1707 no sign of corrossion i have spining fan no chime
ppbus_g3h is 12.6v

i notice that when i use to put the charger to u3100 designated usbport the q3100 is getting very hot.
i tried replace u3100/q3100 still the same.
but when i use another ports im having the same amp. from 1.44- to 2 to 3.++amp. but q3100 is not getting hot.
 

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Do you have such high current with board alone, without battery connected?
CPU core voltage present?

Compare diode mode readings around Q/U3100 with the other ports.
 
( board alone, ?) yes
PPVCORE_S0_GPU 0.9v
PPVCORE_S0_GFX_PH2 0.9v

im still having high current even i used other ports
q/u3200 not over heating when i use this port but high current also.

around q/u3100 resistance compare to other port is normal.
(i also compare to other working board)
 

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Post diode mode readings and voltage on all LDO outputs of the 4 CD3215 chips.

Do you get USB activity?
 
no usb activity
U3200
PP3V3_UPC_XB_LDO 0.496 3.3V
PP1V1_UPC_XB_LDO_BMC 0.512 1.1V
PP1V8_UPC_XB_LDOA 0.519 1.8V
PP1V8_UPC_XB_LDOD 0.479 1.8V

U3100
PP3V3_UPC_XA_LDO 0.490 3.3v
PP1V1_UPC_XA_LDO_BMC 0.516 1.1V
PP1V8_UPC_XA_LDOA 0.521 1.8v
PP1V8_UPC_XA_LDOD 0.472 1.8V

UB300
PP3V3_UPC_TA_LDO 0.505 3.3V
PP1V1_UPC_TA_LDO_BMC 0.482 1.1V
PP1V8_UPC_TA_LDOA 0.490 1.8V
PP1V8_UPC_TA_LDOD 0.455 1.8V

UB400
PP3V3_UPC_TB_LDO 0.505 3.3v
PP1V1_UPC_TB_LDO_BMC 0.483 1.1V
PP1V8_UPC_TB_LDOA 0.491 1.8V
PP1V8_UPC_TB_LDOD 0.456 1.8V
 
(good BIOS.) ?
q3100 is overheating very hot.

anyway i did try good bios came from backed up from another a1707 same board number.
 

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Board turns on, has even CPU core; even if not correct voltage.

Only Q3100 gets hot, U3100 heats normal?
Be sure is not other component, check opposite board side too.
Check UPC_XA_GATE2 trace between Q/U3100.
 
i changed again q3100 now no more hot (this part)
but still no usb activity
cpu still getting hot.
if u have good bios can u share it to me
or is there something need to check?
thanks anyways.
 
Try this, as is...

after this nothing happens still the same,
even i get cpu core voltage it is posible cpu spoil?
or still something that i can check?
 
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