hp elitebook 840 g3 battery present but not charging

[karim011]

problem battery present but not charging. I tried to replacing 3 batteries and chargers but without result. Pls you help.

[mon2]

Re: hp elitebook 840 g3 battery present but not charging

Hi. If someone has this schematic or BV file - they will post to your other thread in the schematic requests. Just checked my database and could not locate one.

While waiting...

1) review where the power adapter enters the board -> you should see 2 x DCin mosfets (8 pin part).

2) near the DCin mosfets will be the charger IC. The charger IC controls the DCin mosfets as well as 1 x battery mosfet and 2 x battery charge mosfets (to dial up the voltage to charge the battery pack).

Read off the markings from the charger IC -> or post clear pictures of this device. We need to know the markings so we can review example schematics to learn about your laptop.

[karim011]

Re: hp elitebook 840 g3 battery present but not charging

ok. thank u so much for replay

[Stevedb]

Re: hp elitebook 840 g3 battery present but not charging

What is board number ?

[mon2]

Re: hp elitebook 840 g3 battery present but not charging

6050a2892401-mb- a01

[Stevedb]

Re: hp elitebook 840 g3 battery present but not charging

Is not available i think

[app82]

Re: hp elitebook 840 g3 battery present but not charging

Another schematic or chip datasheet may help. Sometimes dead mosfet causing this problem if there is internal chargepump of the chip failed to turn another mosfet on, because the dead mosfet short it.

[Stevedb]

Re: hp elitebook 840 g3 battery present but not charging

Did you already replace the second mosfet? Check if battery is recognised in bios. Which charging ic you have on your board.