Dell Latitude 5420 Bios Password 8FC8

[trunguntilyou]

Hello

A while back I requested an unlock for my bios but I flashed the unlocked file the laptop showed no signs of life other than an orange light that would stay on so long as the power button was pressed, other than that no signs of life. If I flashed the locked bios back then the laptop would boot but still be locked obviously. I was told that the unlock file was correct and to check my soldering, which I did and the soldering was fine as I was able to rewrite the original bios back fine and read it again. I have tried every guide on here to the best of my ability with no results, even going so far as ordering a new blank chip in case I had somehow damaged the old one and its the same issue.

Would someone please be willing to take a second look at the dumps and see if there is something keeping the unlocked file from powering on the laptop, or point me in the right direction to fix it myself?

Thank you

Model: Dell Latitude 5420
Service Tag: JSYN5J3-8FC8
Chip: XMC25RH256CXIQ
Board: GDF40 LA-K491P Rev: 2.0 (A01)

only use original ROM ,,, small opinion

[Alatar3791]

it seems ok...maybe you wrote it with errors...try again...

I have tried several times, even re-reading the chip after flashing to compare checksums of the unlocked file and what was just flashed and they match. If I flash the locked file it will power on to the password screen so I know that the chip is being written properly but something about the unlocked file keeps it from powering on. Is there a chance something else was corrupted on the EC chip when reflashed?Any other suggestions of things I can troubleshoot?

[peste]

Hello

A while back I requested an unlock for my bios but I flashed the unlocked file the laptop showed no signs of life other than an orange light that would stay on so long as the power button was pressed, other than that no signs of life. If I flashed the locked bios back then the laptop would boot but still be locked obviously. I was told that the unlock file was correct and to check my soldering, which I did and the soldering was fine as I was able to rewrite the original bios back fine and read it again. I have tried every guide on here to the best of my ability with no results, even going so far as ordering a new blank chip in case I had somehow damaged the old one and its the same issue.

Would someone please be willing to take a second look at the dumps and see if there is something keeping the unlocked file from powering on the laptop, or point me in the right direction to fix it myself?

Thank you

Model: Dell Latitude 5420
Service Tag: JSYN5J3-8FC8
Chip: XMC25RH256CXIQ
Board: GDF40 LA-K491P Rev: 2.0 (A01)

it seems ok...maybe you wrote it with errors...try again...

[Alatar3791]

Hello

A while back I requested an unlock for my bios but I flashed the unlocked file the laptop showed no signs of life other than an orange light that would stay on so long as the power button was pressed, other than that no signs of life. If I flashed the locked bios back then the laptop would boot but still be locked obviously. I was told that the unlock file was correct and to check my soldering, which I did and the soldering was fine as I was able to rewrite the original bios back fine and read it again. I have tried every guide on here to the best of my ability with no results, even going so far as ordering a new blank chip in case I had somehow damaged the old one and its the same issue.

Would someone please be willing to take a second look at the dumps and see if there is something keeping the unlocked file from powering on the laptop, or point me in the right direction to fix it myself?

Thank you

Model: Dell Latitude 5420
Service Tag: JSYN5J3-8FC8
Chip: XMC25RH256CXIQ
Board: GDF40 LA-K491P Rev: 2.0 (A01)

[SMDFlea]

https://www.badcaps.net/forum/troubl...23#post1622423

[b4rdock]

here file unlocked

[CornholioGSM]

hello hello

i have one for onlock.
Latitude 5420, 8FC8, ST: 301H1F3, mobo: LA-K491P

[peste]

Hello,
I have a Dell Latitude 5420
Service Tag: BZN82F3
How can i take the bios password?
The tool ios backup toolkit v2 0 does not work.
Can you help me?
Thanks in advance

post the original contents of the bios chip..

you need an SPI programmer...here is a video for example..https://www.youtube.com/watch?v=DWWi...nnel=ThisIsHow

[Lordemestre]

Hello,
I have a Dell Latitude 5420
Service Tag: BZN82F3
How can i take the bios password?
The tool ios backup toolkit v2 0 does not work.
Can you help me?
Thanks in advance

[techrecycle]

https://www.badcaps.net/forum/troubl...er#post3614700

thanks

[danito]

Hello,
I have a Dell Latitude 5420
Service Tag: 2BQS3J3-8FC8
Please help me unlock the bios admin password

read the rules..https://www.badcaps.net/forum/troubl...before-posting

post the original bios of the laptop even if it is corrupted,the motherboard model, etc.

[kappa1337]

Hello,
I have a Dell Latitude 5420
Service Tag: 2BQS3J3-8FC8
Please help me unlock the bios admin password

[rex98]

please help me to remove bios password

thanks in advance

ST: 98ZR1F3

https://www.badcaps.net/forum/troubl...er#post3614700

[techrecycle]

please help me to remove bios password

thanks in advance

ST: 98ZR1F3

[Harvey Merrah]

Do you have a hot air..a bios programmer !

Hi
Yes i have

[Sley]

SMDFlea Thank you !

[SMDFlea]

Thread merged. W25Q256JV

[Sley]

Hello everyone,

I'm currently working on a Dell Latitude 5420 that is locked with a BIOS password.

I've identified two different Winbond chips on the motherboard (see attached photos):

• A Winbond W25Q256JV
• A Winbond W25Q80DVSIG

Before proceeding with a BIOS dump and flash, I want to be sure:

Which of these two chips actually stores the BIOS password?

Thanks a lot for your help!

[SMDFlea]

PLS HELP: Dell Latitude 7320 Detachable - Bios Password 8FC8

Off topic, post your request in one of the Latitude 7320 topics. Read the rules -> https://www.badcaps.net/forum/troubl...before-posting

[namtel]

PLS HELP: Dell Latitude 7320 Detachable - Bios Password 8FC8