latitude 5420 board LA-k491P bios problem.

[hoaca388]

Dell latitude 5420
ST; 4GD29K3
MB; GDF40 LA-K491P Rev;3.0(A02)
Bios can't start. Thank

Latitude 5420

Service Tag: 4GD29K3

[Prono113]

Latitude 5420

Service Tag: 4GD29K3

THANK MASTER

[jdmrcs]

need help on my Latitude 5420 admin locked
F4F76M3-8F8
ST: F4F76M3

[peste]

need help on my Latitude 5420 admin locked
F4F76M3-8F8
ST: F4F76M3

post the original contents of the bios chip..post motherboard model,etc

[mshone]

Hi there. Problem with corrupted bios image

Dell latitude 5420
Motherboard GDF40 LA-K491P
Rev. 2.0 (A01)
PWB:2FM7C

CPU is intel core i5 11^th gen

Service tag 5H476J3
Express service code 1191889191

Trying to boot up, but nothing. Several times flashing power on button and keyboard for few seconds, and turning off. After a few loops, entering in service mode (asume)-display is all white, red, green, blue and turning off.
Redaing bios chip winbond 25R256JVEN - 32 mb, but all is FF.

Any help, idea, sugestion, maybe bios file....? Thanks in advance.


SOLVED !!! Solution was in bios image form other lap of same model.

[peste]

Hi there. Problem with corrupted bios image

Dell latitude 5420
Motherboard GDF40 LA-K491P
Rev. 2.0 (A01)
PWB:2FM7C

CPU is intel core i5 11^th gen

Service tag 5H476J3
Express service code 1191889191

Trying to boot up, but nothing. Several times flashing power on button and keyboard for few seconds, and turning off. After a few loops, entering in service mode (asume)-display is all white, red, green, blue and turning off.
Redaing bios chip winbond 25R256JVEN - 32 mb, but all is FF.

Any help, idea, sugestion, maybe bios file....? Thanks in advance.

post the contents of the bios chip even if it is corrupted..

The bios chip must be unsoldered from the board before writing or reading..
do not use the clip, you may have errors..if you do not have anything to unsolder it with,
solder wires between the programmer and the bios chip..

[mshone]

post the contents of the bios chip even if it is corrupted..

The bios chip must be unsoldered from the board before writing or reading..
do not use the clip, you may have errors..if you do not have anything to unsolder it with,
solder wires between the programmer and the bios chip..

corrupted bios file is attached. In programmer, all are FFs..Reading was in adapter, not soldered. Thanks

[SMDFlea]

corrupted bios file is attached. In programmer, all are FFs..Reading was in adapter, not soldered. Thanks

What model is your programmer and the software version. Is the chip in the support list or did you choose a different one. Are you using Auto-detect.

[mshone]

What model is your programmer and the software version. Is the chip in the support list or did you choose a different one. Are you using Auto-detect.

Programmer is xgecu T48, software is newest, model of chip is on list of supported. In past, about 20 pcs of same model laptop i was unlocked, with python unlocker for 8FC8, and then i was used POGO clip, withou any problem. This lap was came to me yesterday in this condition as described, and my knowledge did not make me able to solve this. Can i use form other specimen od the absolutely same model?

[mshone]

PROBLEM SOLVED !!!! took bios image from other lap same model, unlocked, programmed, and is working ! Thanks for effort SMDFlea !!!

[Seri Sihombing]

plizz anyone cant help me fix this bios ,,case do not turn on
dell latitude 5420
motherboard gdf40 la-k491p rev 2.0 (a01)
Service tag: 3R0KQN3
TANKYU...

[hoaca388]

plizz anyone cant help me fix this bios ,,case do not turn on
dell latitude 5420
motherboard gdf40 la-k491p rev 2.0 (a01)
Service tag: 3R0KQN3
TANKYU...

Fix with what ?

[Bios Cracker]

plizz anyone cant help me fix this bios ,,case do not turn on
dell latitude 5420
motherboard gdf40 la-k491p rev 2.0 (a01)
Service tag: 3R0KQN3
TANKYU...

Attach your original dump file.

[Seri Sihombing]

here sir

[ruletero]

Please bios for LA-K491p Rev. 2.0 A01 2021-04-28
ST 1JKMPN3
Core i5 11th Gen

I tried several bios of the thread but nothing is working for me, power led turns on for 15 seconds, lights on keyboard, and turn off, a cycle.

Attached bios backup but I don´t know if it is the original, laptop comes frome another technician.

[jashanpreet]

Hi i got 5420 LAPTOP WITH BIOS PASSWORD
WHEN I TRIED TO READ THE BIOS I THINK ITS CROUPTED
I TRIED TO REWHITE BUT NOW DISPLAY IS ALSO NOT COMIN
PLZ HELP ME TO BUILD A NEW BIOS WITHOT PASSWOWD
DELL 5420
PART NO LA-K491P REV 2 2020-11-16
SERVICE TAG 8HW38C3
I7 11TH GEN

[SMDFlea]

is your caps lock stuck on - you should ask for a solution to this?

[Markus1741]

Hi i got 5420 LAPTOP WITH BIOS PASSWORD
WHEN I TRIED TO READ THE BIOS I THINK ITS CROUPTED
I TRIED TO REWHITE BUT NOW DISPLAY IS ALSO NOT COMIN
PLZ HELP ME TO BUILD A NEW BIOS WITHOT PASSWOWD
DELL 5420
PART NO LA-K491P REV 2 2020-11-16
SERVICE TAG 8HW38C3
I7 11TH GEN

Hello try ....

[jashanpreet]

CAN YOU FIX THIS BIOS PLZ
THIS ONE IS WORKING BUT STUCK ON DELL LOGO
DELL 5420
PART NO LA-K491P REV 2 2020-11-16
SERVICE TAG 8HW38C3
I7 11TH GEN

[jeliecerlara]

Hi, can you help me please?
I have a BIOS password.

DELL LATITUDE 5420 GDF40 LA-K491P REV 3.0 A02
ST GV711F3

[hoaca388]

Hi, can you help me please?
I have a BIOS password.

DELL LATITUDE 5420 GDF40 LA-K491P REV 3.0 A02
ST GV711F3

Unlocked