latitude 5420 board LA-k491P bios problem.

[LBTT1121]

it's already up. and as before, when entering servicetag, Agree and it cannot boot anymore

try

[dathien123]

it's already up. and as before, when entering servicetag, Agree and it cannot boot anymore

[LBTT1121]

Thanks but it doesn't work

try

[dathien123]

try and feedback

Thanks but it doesn't work

[LBTT1121]

This is its original bios

try and feedback

[dathien123]

This is its original bios

[dathien123]

HI try feedback

Thank. but it only resets a few times and doesn't show up on the screen. I will send you its original bios. I think it's defective. I randomly copied the bios from the website and it booted, but when I entered the service tag, I agreed and it couldn't boot anymore.

[shiyab]

Hello. Can anyone help me? My laptop has a BIOS error. Copied another BIOS and it worked but the service tag was displayed. After entering the service tag and restarting, the power will be lost
ST: 4KR3DB3
GDF40 LA-k491p
rev : 2.0(A01)
2020-11-16

HI try feedback

[dathien123]

Hello. Can anyone help me? My laptop has a BIOS error. Copied another BIOS and it worked but the service tag was displayed. After entering the service tag and restarting, the power will be lost
ST: 4KR3DB3
GDF40 LA-k491p
rev : 2.0(A01)
2020-11-16

[SMDFlea]

Can someone help me? I have a Dell Latitude 5420 on my workbench, LA-K491P REV 2.0 2020 11 16, that won't turn on; only the orange light comes on when I press the power button. I know it's a BIOS problem; it came from another repair shop. I don't have the original file.

Note: Cover without service tag.

Thread merged. There are hundreds of posts in this topic, you will find many working bios versions here, just try some.

[Fabricio Souza]

Can someone help me? I have a Dell Latitude 5420 on my workbench, LA-K491P REV 2.0 2020 11 16, that won't turn on; only the orange light comes on when I press the power button. I know it's a BIOS problem; it came from another repair shop. I don't have the original file.

Note: Cover without service tag.

[LBTT1121]

plz need help , need to unlock this dump

s/n. GRG1DK3
LA-K491P REV 3

try and feedback

[jaigenius]

plz need help , need to unlock this dump

s/n. GRG1DK3
LA-K491P REV 3

[LBTT1121]

Hello

New test today: I flashed a clean BIOS, entered a service tag, then pressed Alt+F and booted directly from an SSD with Windows. I ran Windows for several hours; it performed updates, the computer rebooted, and then nothing again... I can't restart it.

Does anyone have any ideas, please? If I reflash the BIOS, the PC boots directly but how do I keep it stable?

I've attached the original BIOS file.

try

[bouny56]

Hello, could you please help me?
Dell Latitude 5420
Motherboard: LA-K491P Rev 3.0 (A02)
The motherboard was purchased separately, so I don't have its original serial number, but I would like to use the serial number JL7Y3J3.
Symptom: Won't turn on
Consumption of 0.04A

Tested with several BIOS versions from the forum: Factory mode OK, I enter the serial number and disable Absolute => OK, reboot, then shuts down and won't restart. If I re-flash the BIOS, it remains stable in the BIOS. But if I restart, it won't turn on.

Thank you in advance.

Hello

New test today: I flashed a clean BIOS, entered a service tag, then pressed Alt+F and booted directly from an SSD with Windows. I ran Windows for several hours; it performed updates, the computer rebooted, and then nothing again... I can't restart it.

Does anyone have any ideas, please? If I reflash the BIOS, the PC boots directly but how do I keep it stable?

I've attached the original BIOS file.

[bouny56]

hello, thanks, the motherboard start , i write the service tag, disable absolute, ok , the motherboard restart then shutdown , and no start again If i write again your bios, same work, write service tag then nothing

Hello, I saw other posts on the forum with the same symptoms. Flashed a new BIOS ok, entered the service tag ok, disabled Absolute ok, rebooted and then it wouldn't turn on anymore. Has anyone found a solution please? Thank you

[LBTT1121]

Could someone help me???

Dell Latitude 5420
Service Tag: 7TXKZJ3
La-K491P Rev 2.0
Doesn't turn on

TRY https://www.badcaps.net/forum/troubl...79#post3802679

[primolipe]

Could someone help me???

Dell Latitude 5420
Service Tag: 7TXKZJ3
La-K491P Rev 2.0
Doesn't turn on

[bouny56]

try and feedback

hello, thanks, the motherboard start , i write the service tag, disable absolute, ok , the motherboard restart then shutdown , and no start again If i write again your bios, same work, write service tag then nothing

[LBTT1121]

Hello, could you please help me?
Dell Latitude 5420
Motherboard: LA-K491P Rev 3.0 (A02)
The motherboard was purchased separately, so I don't have its original serial number, but I would like to use the serial number JL7Y3J3.
Symptom: Won't turn on
Consumption of 0.04A

Tested with several BIOS versions from the forum: Factory mode OK, I enter the serial number and disable Absolute => OK, reboot, then shuts down and won't restart. If I re-flash the BIOS, it remains stable in the BIOS. But if I restart, it won't turn on.

Thank you in advance.

try and feedback