hp DA0U83MB6E0 REV C

[ahmarzo]

Vin is ok 3v and 5v is coming there is voltage 3v on power button,but dc jack light is off and no power on
have flashed the bios but same problem.

[mon2]

Re: hp DA0U83MB6E0 REV C

You may have a problem with the external power adapter.

Often, HP / Dell adapters have an ID (identification) so that the logic board can determine if the power adapter is able to supply the proper power.

Measure the AD_ID voltage to ground on CN12 connector.

Are you using the original power adapter ? What is the rating of this adapter ?

[ahmarzo]

Re: hp DA0U83MB6E0 REV C

Thanks for your reply
I got 0v on ec2

[reassor]

Re: hp DA0U83MB6E0 REV C

iirc in HP AC_ID has some LDO voltage created futher on the board and resistor in the charger jack creates voltage divider to determine wattage (or was that lenovo? ;p)

Check if line shorted to GND.

I might be wrong tho.

[ahmarzo]

Re: hp DA0U83MB6E0 REV C

Thanks for the guidance. The problem got solved after programming the ec bios.