DELL LATITUDE E6420 NOT CHARGING ISSUE

Post Reply
skbasir
Member
Member
Posts: 36
Joined: Thu Jun 16, 2016 3:46 pm
Location: BHUBANESWAR
Contact:

DELL LATITUDE E6420 NOT CHARGING ISSUE

Post by 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
Attachments
PQ33 ( REPLACE WITH 4812B)
PQ33 ( REPLACE WITH 4812B)
PQ31 ( REPLACE WITH 4800B)
PQ31 ( REPLACE WITH 4800B)
+VCHRG SHORT PQ31/PQ33
+VCHRG SHORT PQ31/PQ33
BOARD PART
BOARD PART
deepak9812423104
Newbie
Newbie
Posts: 5
Joined: Mon Aug 08, 2016 1:17 pm

Re: DELL LATITUDE E6420 NOT CHARGING ISSUE

Post by deepak9812423104 »

good work sir
User avatar
javed
TOP poster
TOP poster
Posts: 91
Joined: Mon Dec 14, 2015 10:51 am

Re: DELL LATITUDE E6420 NOT CHARGING ISSUE

Post by javed »

nice
sir..
rahulsan
Member
Member
Posts: 26
Joined: Thu Jun 09, 2016 12:11 pm

Re: DELL LATITUDE E6420 NOT CHARGING ISSUE

Post by rahulsan »

NICE WORK SIR KEEP IT UP
User avatar
Farrukh
Newbie
Newbie
Posts: 1
Joined: Mon Mar 25, 2019 6:06 pm

Re: DELL LATITUDE E6420 NOT CHARGING ISSUE

Post by Farrukh »

Thanks sir great work
User avatar
ganthan
Newbie
Newbie
Posts: 6
Joined: Fri Nov 22, 2019 6:26 am

Re: DELL LATITUDE E6420 NOT CHARGING ISSUE

Post by ganthan »

Good troubleshooting tips. Thank you.
Post Reply

Return to “Laptop Case Studies”

Who is online

Users browsing this forum: No registered users and 58 guests