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Old 02-07-2023, 07:21 AM   #1
SR IT SOLUTION
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Angry dell e6440 no battery detected

dell e6440 la-9931p rev:1.0 battery not detected already i replace battery
still problem same. pls help thanks in advanced
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Old 02-07-2023, 09:14 AM   #2
mon2
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Default 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.
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File Type: jpg battery_ESD.jpg (170.7 KB, 11 views)
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Old 02-07-2023, 11:06 PM   #3
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Default Re: dell e6440 no battery detected

Sometimes its a shorted cap or mosfet on discharge circuit.
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Old 02-08-2023, 01:48 AM   #4
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Default Re: dell e6440 no battery detected

yes!!!
done pd2 is faulty i remove pd2 now battery detected
thanku so much
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Old 02-08-2023, 04:32 AM   #5
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Default Re: dell e6440 no battery detected

Quote:
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.
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