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02-07-2023, 07:21 AM
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#1 |
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Member
Join Date: Jan 2023
City & State: NEW DELHI
My Country: INDIA
I'm a: Knowledge Seeker
Posts: 33
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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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02-07-2023, 09:14 AM
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#2 |
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Badcaps Veteran
Join Date: Dec 2019
City & State: Windsor, Ontario
My Country: Canada
Line Voltage: 110VAC
I'm a: Knowledge Seeker
Posts: 6,848
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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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02-07-2023, 11:06 PM
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#3 |
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Badcaps Veteran
Join Date: Jun 2015
City & State: siliguri
My Country: india
Line Voltage: 220vac,60hz
I'm a: Professional Tech
Posts: 5,254
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Re: dell e6440 no battery detected
Sometimes its a shorted cap or mosfet on discharge circuit.
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02-08-2023, 01:48 AM
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#4 |
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Member
Join Date: Jan 2023
City & State: NEW DELHI
My Country: INDIA
I'm a: Knowledge Seeker
Posts: 33
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Re: dell e6440 no battery detected
yes!!!
done pd2 is faulty i remove pd2 now battery detected thanku so much |
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02-08-2023, 04:32 AM
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#5 | |
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Badcaps Veteran
Join Date: Dec 2019
City & State: Windsor, Ontario
My Country: Canada
Line Voltage: 110VAC
I'm a: Knowledge Seeker
Posts: 6,848
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Re: dell e6440 no battery detected
Quote:
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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