need bios dump dell latitude 5420 (cpu 11th)

[kamkooltech]

Did you save the original bios before trying others ? .If you did we can check if the service tag in the bios matches with the one you gave, and check if the configuration is ok. If you havn`t got the original bios then we can only assume that the service tag is right one, but the base cover might be from a different laptop.
From the laptop configuration (see attached csv file) based on the service tag the CPU should be an i5-1145g7 - Tiger Lake. You can check the CPU part number to see if it is or not (somettime the motherboard model number will have the chipset name in it).
Also from the configuration you will see it has non-vPro CSME firmware with ME disabled. There are more that 900 posts in this thread and there will be some bios with clean CSME/ME firmware matching that particular configuration.
Use MEAnalyzer to check which bios versions have clean (Configured) firmware or not clean (Initialised) ,and look at the chipset support, if it says TGL it`s Tiger Lake, if it says CML it is Comet Lake. Obviously if you have a Tiger Lake CPU you
don`t want to use a Comet Lake bios.

.

boss you are too good take me, this is a big class you teach me

[LBTT1121]

boss you are too good take me, this is a big class you teach me

try bios NonVpro and feedback

[kamkooltech]

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

boss, i'm sorry for late replied. i did not save the bios file i met on the chip because it did not power because i have a universal working file i usually use for 5420 but i make used of it, it come up but no image show on the screen and it did not make any Alt+F sound the chip number Gigadevice 25R256DY10
WORKING FILE I USE POSTED

[johnnypicnic]

Can anyone help me with this bios? I ran the 8FC8 patcher but get 3 amber 6 white "Flash corruption detected by SBIOS" error code and then the colour test sequence.
ST: 6Q0R5G3

[LBTT1121]

Can anyone help me with this bios? I ran the 8FC8 patcher but get 3 amber 6 white "Flash corruption detected by SBIOS" error code and then the colour test sequence.
ST: 6Q0R5G3

load bios into original IC

[johnnypicnic]

load bios into original IC

Do I have any options if I don't have the original IC?

[froilas]

Hello. Can you help me provide an unlock bios dump for Dell Latitude 5420 - GDF40 LA-K491P Rev:3.0 (A02)

Service tag is DSD24J3

I flashed the wrong file and I don't have my backup bios dump.

Thank you

[rex98]

Hello. Can you help me provide an unlock bios dump for Dell Latitude 5420 - GDF40 LA-K491P Rev:3.0 (A02)

Service tag is DSD24J3

I flashed the wrong file and I don't have my backup bios dump.

Thank you

here
1st boot press f2 write service tag reboot then the press alt +f

[froilas]

here
1st boot press f2 write service tag reboot then the press alt +f

Tried this on Neoprogrammer 2.2.0.10 using W25Q256BV as IC since XM25RH256C is not available on the list. After flashing it, when turning it on. Only a faint amber light appear when holding the power button and dissaappears when released, with no video output, no post.

I'm using the ch341a v1.7 and wson8 probe to flash the bios (since i don't have any micro soldering skills)

[rex98]

Tried this on Neoprogrammer 2.2.0.10 using W25Q256BV as IC since XM25RH256C is not available on the list. After flashing it, when turning it on. Only a faint amber light appear when holding the power button and dissaappears when released, with no video output, no post.

I'm using the ch341a v1.7 and wson8 probe to flash the bios (since i don't have any micro soldering skills)

flash this if its tested. the first one i sent is LA-K491P same as yours and its working. this second one is also working.
remove the chip do not use probe and verify after flashing.
make sure to remove the cmos battery before flashing.

[froilas]

flash this if its tested. the first one i sent is LA-K491P same as yours and its working. this second one is also working.
remove the chip do not use probe and verify after flashing.
make sure to remove the cmos battery before flashing.

Okay. I'll bring all the files you provided to my local techinician as I don't have the proper tools and skills yet to remove a chip. Thank you so much for the assistance and have a good day.

[spencertech]

help bios password, & DISABLE ABSOLUTE latitude 5420
service tag FB3F1J3

[Blaze Tech]

help bios password, & DISABLE ABSOLUTE latitude 5420
service tag FB3F1J3

try

[spencertech]

try

NOT WORKING

[Thenicksmith]

Hey I'm all new to this and I need help. I have a 5420 and It had a system password lock. Someone else took a look at it and wiped the bios clean so the chip is blank so I don't have one to upload. Does anybody have a bios I can install on this? Help is very appreciated. I did get the chip to read on my programmer and it is blank.
ST: JMPC2F3
MB P#: GDF40 LA-K491P
Rev: 3.0 (A02)
2021 - 04 - 28
Chip: Windbond W25Q80DV

[SMDFlea]

Hey I'm all new to this and I need help. I have a 5420 and It had a system password lock. Someone else took a look at it and wiped the bios clean so the chip is blank so I don't have one to upload. Does anybody have a bios I can install on this? Help is very appreciated. I did get the chip to read on my programmer and it is blank.
ST: JMPC2F3
MB P#: GDF40 LA-K491P
Rev: 3.0 (A02)
2021 - 04 - 28
Chip: Windbond W25Q80DV

There`s 900 posts in this thread and you`ll find a working bios in here, somewhere, just try some.

The W25Q80DV chip is not the bios, it`s for something else, maybe the thunderbolt firmware. Look at the boardview/schematic and confirm if it is thunderbolt or not. If it is there will be a TBT dump on the forum or in this thread. It`s a common mistake that inexperienced members make to backup, erase or try writing to the TBT chip thinking it`s the bios chip.