DELL LATITUDE E6420 NOT CHARGING ISSUE

[skbasir]

DELL LATITUDE E6420 NOT CHARGING

MB- PAL50 LA6591A

PROBLEM- NOT CHARGING

WHEN PUT BATTERY IN LAPTOP IT DOESN'T POWER ON

BOARD ON ONLY WITH ADAPTER


CHECKED IN BIOS 65 WATT ADAPTER IS DETECTING BUT IN IDLE CONDITION ( NOT CHARGING)


CHECK IN BOARD FOUND +VCHRG LINE IS SHORTING

PQ31 & PQ33 BOTH MOSFET ARE SHORT

PQ31 IS 4720 AND PQ33 IS 4820B

BOTH MOSFET ARE N CHANEL BUT PQ33 (4820 IS N- CHANEL 30V WITH SCHOTTKY DIODE)


RESOULATION


REPLACE 4720 (PQ31) WITH 4800B (N- CHANEL 30V MOSFET)

REPLACE 4820 (PQ33) WITH 4812B (N-Channel 30-V (D-S) MOSFET with Schottky Diode)

CHECKED IN BIOS BATTERY CHARGING FINE


NOW LAPTOP WORKING FINE WITH BOTH BATTERY & ADAPTER( 65W)

CHARGING SUCESSFULLY

[deepak9812423104]

good work sir

[javed]

nice
sir..

[rahulsan]

NICE WORK SIR KEEP IT UP

[Farrukh]

Thanks sir great work

[ganthan]

Good troubleshooting tips. Thank you.