dell e6440 no battery detected

[SR IT SOLUTION]

dell e6440 la-9931p rev:1.0 battery not detected already i replace battery
still problem same. pls help thanks in advanced

[mon2]

Re: dell e6440 no battery detected

Battery not detected will be:

1) connector fault

2) connector contacts not soldered

3) ESD diodes clamping the SMBUS circuits - remove PD2 & PD4 and test again. My bet (of a fresh box of Haldiram's motichoor ladoos) are on this fault. Killed 3 days on a macbook (other shops gave up on it) and it was down a tiny tiny SMD ESD dual didoe - needed tweezers to solder it.

See attached. Post your updates.

[mcplslg123]

Re: dell e6440 no battery detected

Sometimes its a shorted cap or mosfet on discharge circuit.

[SR IT SOLUTION]

Re: dell e6440 no battery detected

yes!!!
done pd2 is faulty i remove pd2 now battery detected
thanku so much

[mon2]

Re: dell e6440 no battery detected

SMD ESD dual didoe

DIODE. LOL, salivating while typing ☺️

Good job. The ESD diode did it's job to suppress a transient event at the battery connector. Do replace it if available.