dell latitude 5490 bios

[LBTT1121]

cảm ơn bạn,
tôi vẫn thử,
máy tính xách tay vẫn khởi động, phím caps lock có đèn sáng liên tục, đèn nguồn 2 màu hổ phách và 1 màu trắng nhấp nháy
khi tôi nhấn nút nguồn rồi nhấn nút d, màn hình chuyển sang màu khác rồi không có gì nữa,
CPU không nóng lên chút nào, vẫn lạnh khi tôi chạm bằng ngón tay

power light 2 amber and 1 white ligt blink ---> CPU error

[stewo5241]

HI PRO I NEED FIX MY BIOS, it is sadly at version 0.5 and failed to upgrade to v1.0 or any other versions from Dell site.

DELL LATITUDE 5490 DDM70 LA-F402P REV 0.3(X02)
ST JVLRFH2

This laptop has a NVIDIA GeForce 940MX graphics card but I am not able to find and update a driver for it:
PCI\VEN_10DE&DEV_134D&SUBSYS_08161028&REV_A2\4&2D0E14ED&0&00E4

Thank you.

[peste]

HI PRO I NEED FIX MY BIOS, it is sadly at version 0.5 and failed to upgrade to v1.0 or any other versions from Dell site.

DELL LATITUDE 5490 DDM70 LA-F402P REV 0.3(X02)
ST JVLRFH2

This laptop has a NVIDIA GeForce 940MX graphics card but I am not able to find and update a driver for it:
PCI\VEN_10DE&DEV_134D&SUBSYS_08161028&REV_A2\4&2D0E14ED&0&00E4

Thank you.

post S/T, full name and model, motherboard model,etc.

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

[PCPCPC]

Hello, I need help to remove the administrator password from my Dell Latitude 5490. I have attached my verified BIOS dump file. Thank you very much.

Asset tag: 20002640
Service tag: 3BQD7Y2

[SMDFlea]

Hello, I need help to remove the administrator password from my Dell Latitude 5490. I have attached my verified BIOS dump file. Thank you very much.

Asset tag: 20002640
Service tag: 3BQD7Y2

Thread merged. Your backup is bad it`s only 3.7KB , make another and also post the suffix 3BQD7Y2-E7A8 ,3BQD7Y2-8FC8 etc.

[loko]

Need help for unlock power on bios admin password.
Dell 5490.
MB - DDM70 LA-F401P Rev:3.0 A02.
SN - HTLZ4Y2
EEPROM - UC5 WINBOND 25Q128JVSQ.

[SMDFlea]

Thread merged.

[Txus3232]

Hello, I have this computer and I cannot install Windows because after formatting it asks for internet activation. I bought this laptop at a swap meet while it was turned off. Please I need your help with a clean bios. I will always be grateful

DELL Latitude 5490
service tag JQXGSQ2
board DDM70 LA-F401P Rev 2.0 (A01)
bios GD 25B127DSIG

[peste]

post merged..next time look for a thread with the name and model, motherboard model of the laptop, and post there, if you can't find it, then make a new thread..

[LBTT1121]

Hello, I have this computer and I cannot install Windows because after formatting it asks for internet activation. I bought this laptop at a swap meet while it was turned off. Please I need your help with a clean bios. I will always be grateful

DELL Latitude 5490
service tag JQXGSQ2
board DDM70 LA-F401P Rev 2.0 (A01)
bios GD 25B127DSIG

Try and feedback

[MonkeydBrian]

Hi can someone please fix my bios dump, no picture, starts caps lock light on

SN: CF735S2

[LBTT1121]

Hi can someone please fix my bios dump, no picture, starts caps lock light on

SN: CF735S2

try and feedback

[MonkeydBrian]

try and feedback

Hi its doing same keyboard backlight on and capslock light on after few seconds resets and reset again afterward caps lock goes off and keyboard backlight as well laptop stays on with no display

[LBTT1121]

Hi its doing same keyboard backlight on and capslock light on after few seconds resets and reset again afterward caps lock goes off and keyboard backlight as well laptop stays on with no display

try

[Crisxt]

Hello everyone,

I need help with a Dell Latitude 5490.

• Service Tag: 7STLJR2
• CPU: i5-8350U

Symptoms: The laptop works, but it has a very long POST time (approx. 1 minute to show the Dell logo). The OS logs show many AER (Advanced Error Reporting) recoverable errors related to the PCI bus.

All standard BIOS update methods (from Windows, Linux fwupd, or USB) fail silently. The laptop just reboots without applying the update and shows no errors. It remains on the old BIOS version, 1.13.0.

What I've tried: I used a programmer to dump the BIOS from the 16MB chip (GD25B128CSIG). When I flash a clean .bin extracted from the latest official Dell update (version 1.41.0), the laptop is completely dead (no power, no lights, no fan).

Restoring my original backup dump brings the laptop back to its previous state (slow POST, but it boots and works). This confirms the programming process is correct and the issue is with the BIOS file itself.

Could someone please help me build a working BIOS file? I need to transfer my machine-specific data (Service Tag, Intel Ethernet MAC address, etc.) from my backup to a clean BIOS region from the new update.

I have attached my original backup dump.
Thank you in advance for your help!

[danito]

Hello everyone,

I need help with a Dell Latitude 5490.

• Service Tag: 7STLJR2
• CPU: i5-8350U

Symptoms: The laptop works, but it has a very long POST time (approx. 1 minute to show the Dell logo). The OS logs show many AER (Advanced Error Reporting) recoverable errors related to the PCI bus.

All standard BIOS update methods (from Windows, Linux fwupd, or USB) fail silently. The laptop just reboots without applying the update and shows no errors. It remains on the old BIOS version, 1.13.0.

What I've tried: I used a programmer to dump the BIOS from the 16MB chip (GD25B128CSIG). When I flash a clean .bin extracted from the latest official Dell update (version 1.41.0), the laptop is completely dead (no power, no lights, no fan).

Restoring my original backup dump brings the laptop back to its previous state (slow POST, but it boots and works). This confirms the programming process is correct and the issue is with the BIOS file itself.

Could someone please help me build a working BIOS file? I need to transfer my machine-specific data (Service Tag, Intel Ethernet MAC address, etc.) from my backup to a clean BIOS region from the new update.

I have attached my original backup dump.
Thank you in advance for your help!

try

[Crisxt]

Thank you for the modified file.

I have erased the chip and written your version, but it seems there's an issue.

When I connect the AC adapter, the laptop powers on by itself. Three LEDs light up (Power button, Caps Lock, and the front status LED). The fans start spinning, but nothing else happens. The screen remains completely black and the system does not POST.

The front status LED is blinking, sometimes in amber/orange.

[Crisxt]

My apologies for the confusion, I have a crucial update.

I just discovered that the laptop boots perfectly fine on battery power alone. The previous issue I described (auto-power-on, black screen) only occurs when the AC adapter is connected.

After booting into the OS on battery, I ran the official Dell BIOS update, and it is currently in the process of updating successfully.

It seems the main corruption is fixed. Sorry for the misleading previous post!