Dell Latitude 5420 Bios Password 8FC8

[shiyab]

Please help remove password.

Model: Dell Latitude 5420
Service Tag: JGH6R73
Chip: WB25R256JVEN
Board: GDF40 LA-K491P Rev: 2.0 (A01)

It works perfectly with this bios if i unlock with 8FC8 tool, it works but no M.2 storage but i can boot from USB. Experts please have a look.

hi try

[vivek90]

Getting 3amber & 6white and full fan.

[Sparo]

Please help remove password.

Model: Dell Latitude 5420
Service Tag: JGH6R73
Chip: WB25R256JVEN
Board: GDF40 LA-K491P Rev: 2.0 (A01)

It works perfectly with this bios if i unlock with 8FC8 tool, it works but no M.2 storage but i can boot from USB. Experts please have a look.

Here try this to fix both

[vivek90]

Getting the same 3amber & 6white and full speed fan. Any other image.

[renegade8040@gmail.com]

Hi all,
Got another Dell Latitude 5420 from local electronics recycling.

Need password removal please.

Model: Dell Latitude 5420
Service Tag: JKYC0J3
Suffix: 8FC8
Chip: WB25R256JVEN
flashrom match: W25Q256JV_Q
Board: GDF40 LA-K491P Rev: 3.0 (A02)

[peste]

Hi all,
Got another Dell Latitude 5420 from local electronics recycling.

Need password removal please.

Model: Dell Latitude 5420
Service Tag: JKYC0J3
Suffix: 8FC8
Chip: WB25R256JVEN
flashrom match: W25Q256JV_Q
Board: GDF40 LA-K491P Rev: 3.0 (A02)

try..

[Sparo]

vivek90

Getting the same 3amber & 6white and full speed fan. Any other image.

3,6 is flash currumption detected by SBIOS so Try Extract this to a fresh FAT32 formatted USB. Remove battery and charger then hold the power button for 30 seconds
Next plug in USB hold Ctrl+Esc and plug in the charger (normally it will power on automatically if the CMOS battery is unplugged) See if it updates and fixes the issue

[juhusu]

Hi guys,
Got a Dell Latitude 5420 from a neigbor

Please, I need password removal.

Dell Latitude 5420
Service Tag: CHYC3F3
BIOS Version: 1.8.0
Version: ED.2.0.12
Suffix: 8FC8
Chip: WB25R256JVEN
flashrom match: W25Q256FV
Board: GDF40 LA-K491P Rev: 2.0 (A01)

[LBTT1121]

Hi guys,
Got a Dell Latitude 5420 from a neigbor

Please, I need password removal.

Dell Latitude 5420
Service Tag: CHYC3F3
BIOS Version: 1.8.0
Version: ED.2.0.12
Suffix: 8FC8
Chip: WB25R256JVEN
flashrom match: W25Q256FV
Board: GDF40 LA-K491P Rev: 2.0 (A01)

try

[juhusu]

Hey man, I really appreciate your help with this. It worked, and I’m very grateful for your support.

One thing I noticed though — the fan is running at full speed all the time. If you have any idea what could be causing that or how to fix it, please let me know.

Thanks again, I truly appreciate it.

[serseb]

Hello all,

Can someone please help me with the attached 3FE2 BIOS password removal for my Latitude 5420?
ST: GSV0DK3
Motherboard: GDF40 LA-K491P Rev: 3.0

Thanks heaps!

[LBTT1121]

Hello all,

Can someone please someone me with the attached 3FE2 BIOS password removal for my Latitude 5420?
ST: GSV0DK3
Motherboard: GDF40 LA-K491P Rev: 3.0

Thanks heaps!

try

[serseb]

Worked great, as always. Thanks a lot!

[Nguyen Van Thanh]

Hi all
Please help me rebuild bios. The device only boots to the logo each time it's powered on and shutdown
ST: HN9BLN3
Motherboard: GDF40 LA-K491P Rev: 2.0(A01)

[LBTT1121]

Hi all
Please help me rebuild bios. The device only boots to the logo each time it's powered on and shutdown
ST: HN9BLN3
Motherboard: GDF40 LA-K491P Rev: 2.0(A01)

post bios Original. Bios you download internet

File System State │ Configured

[Nguyen Van Thanh]

post bios Original. Bios you download internet

File System State │ Configured

This is the BIOS I read about from the BIOS chip, but I'm not sure if it's the original BIOS.

[Sparo]

This is the BIOS I read about from the BIOS chip, but I'm not sure if it's the original BIOS.

Hi Try this file

[vivek90]

vivek90



3,6 is flash currumption detected by SBIOS so Try Extract this to a fresh FAT32 formatted USB. Remove battery and charger then hold the power button for 30 seconds
Next plug in USB hold Ctrl+Esc and plug in the charger (normally it will power on automatically if the CMOS battery is unplugged) See if it updates and fixes the issue

Thanks!

If i follow these steps, its getting into a loop and there is no activity on USB drive. Is there any other key combination that Im missing.

[Sparo]

Thanks!

If i follow these steps, its getting into a loop and there is no activity on USB drive. Is there any other key combination that Im missing.

There is only one combination but I see it didn't work either
Post a clear picture of the area surrounding the chip then

[vivek90]

There is only one combination but I see it didn't work either
Post a clear picture of the area surrounding the chip then

Yes, i was not knowing it was locked one and i installed windows and it updated bios to the latest one 1.49v. If it would have been in older bios unlock would have been easier, I guess.

[Sparo]

Yes, i was not knowing it was locked one and i installed windows and it updated bios to the latest one 1.49v. If it would have been in older bios unlock would have been easier, I guess.

Everything seems in place. Here are 3 working BIOS files I'll be posting for everyone V1.8.0, V1.15.1 and V1.25.0 (MBID GDF40 LA-K491P Rev: 2.0 (A01))
Try them and give it time to boot before attempting another one. They should work unless something is being done wrong

[vivek90]

Thank you. Will try 1 by 1 & reply.

[vivek90]

Everything seems in place. Here are 3 working BIOS files I'll be posting for everyone V1.8.0, V1.15.1 and V1.25.0 (MBID GDF40 LA-K491P Rev: 2.0 (A01))
Try them and give it time to boot before attempting another one. They should work unless something is being done wrong

I tried all of the three bios dumps, but all have the same result " 6 times White " surprisingly no amber only white.

May be the latest bios has updated the ME or put an valid check for the ME. Just now i checked if i use with original locked bios its working as usual.

Let me know if we can try out anything else. Thank you!

[vivek90]

Yes, lets ask. Even have changed the bios chip to new one for fresh install but its showing same symptoms.

[vivek90]

SMDFlea please have a look.

[vivek90]

SMDFlea Your kind attention please.

[SMDFlea]

vivek90 try this bios.

[vivek90]

Now there are no amber or white lights showing but the laptop keeps rebooting multiple times once i get dell logo screen then it again reboots by itself.

[Sparo]

Your case is special and You said when you flash back your original BIOS file it works fine but it has the BIOS password right?

[vivek90]

Yes it works fine the BIOS with password, i cannot make any changes in bios. To reinstall OS i need to have another PC. May be Dell has locked ways for bios in latest update. Please provide another bios to check.

[Sparo]

vivek90

Yes it works fine the BIOS with password, i cannot make any changes in bios. To reinstall OS i need to have another PC. May be Dell has locked ways for bios in latest update. Please provide another bios to check.

Okay Try these files as well

[vivek90]

I was out for few days.

Tested these bios, there is dell logo on screen and 3 times amber & 6 times white. Then i tried the esc + ctrl to update the bios its getting into loop. SMDFlea your kind attention.