Dell Latitude 5400 Bios password

[g_george_n]

One more thing, I know how to remove the chip from the board, but I'm asking you guys because you're specialists and I don't want to ruin them.

[Kinshir]

Hello you can try this new build bios from your corrupt original bios good luck ....

Hello and thank you very very much,

This last build worked, I managed to push it to the laptop and did a double verification and it started and it works.
What did you do, how did you do?

Thank you very much!

[BIOSSASI]

Anyone Who Need CLEAR ME For "DELL LATITUDE 5400 EDC41 LA-G892P REV 1.0 32MB"
Enjoy
Patched BIOS Only For EDC41 LA-G892P REV 1.0 32MB
Again Confirming This is Only For 32MB ( 32,768 KB )

01.Flash
02.Connect Power Adaptor & The Flashing ME will be start Automatically.

Some Updated ME will Directly Boot ! Dont Worry

NO DELAY BOOT , NO HANGS , NO BUGS !!!
Have a great Day !

[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..

[peste]

Anyone Who Need CLEAR ME For "DELL LATITUDE 5400 EDC41 LA-G892P REV 1.0 32MB"
Enjoy
Patched BIOS Only For EDC41 LA-G892P REV 1.0 32MB
Again Confirming This is Only For 32MB ( 32,768 KB )

01.Flash
02.Connect Power Adaptor & The Flashing ME will be start Automatically.

Some Updated ME will Directly Boot ! Dont Worry

NO DELAY BOOT , NO HANGS , NO BUGS !!!
Have a great Day !

post S/N, full name and model, motherboard model,TYPE,etc.

[Kinshir]

Hello again,

Is there a way to check if a Dell Bios .bin file is corrupted or any tool for this matter?

Thank you very much!

[BIOSSASI]

Anyone Who Need CLEAR ME For "DELL LATITUDE 5400 EDC41 LA-G892P REV 1.0 32MB"
Enjoy
Patched BIOS Only For EDC41 LA-G892P REV 1.0 32MB
Again Confirming This is Only For 32MB ( 32,768 KB )

01.Flash
02.Connect Power Adaptor & The Flashing ME will be start Automatically.

Some Updated ME will Directly Boot ! Dont Worry

NO DELAY BOOT , NO HANGS , NO BUGS !!!
Have a great Day !

Sure ! sorry , Mistakenly Posted as a new topic. Thank You.

[Alejandro Luo]

Hi everyone,

I’m trying to read (backup) the BIOS from a GigaDevice GD25Q256DYIG (3.3 V) on a Dell Latitude 5400 (LA-G892P, 2019).

My setup:

• CH341A (black), hardware-modded to output 3.3 V (because at 5 V it wouldn’t read).
• NeoProgrammer on Windows (the CH341A is detected fine).
• SOIC8 clip (to avoid desoldering).
• I also have a 1.8 V adapter (only to test behavior; I know the chip is 3.3 V).

Problem:

• With the CH341A plugged in, NeoProgrammer sees the programmer.
• The moment I clip onto the BIOS chip, Windows plays the USB-disconnect sound and the CH341A drops off the bus.
• If I insert the 1.8 V adapter, the USB doesn’t disconnect anymore, but of course the chip won’t read because it needs 3.3 V.

So far I’ve tried many things (different USB ports/cables, slower SPI speed in NeoProgrammer, etc.). My suspicion is a power/voltage/current issue or in-circuit loading from the motherboard.

Questions / Help wanted:

1. Has anyone seen this exact behavior (CH341A disconnects when clipping on at 3.3 V, but stays connected at 1.8 V) and found a fix?
2. Is this likely the motherboard back-feeding / overloading the 3.3 V rail when I inject 3.3 V from the CH341A?
3. Would you recommend isolating VCC (lifting pin 8) or just desoldering and reading off-board?
4. Do I need pull-ups on /WP and /HOLD, or any specific wiring tweaks for this model?
5. Any checklist to confirm proper pinout/contact on WSON-8 (if this package is WSON on this board), since a SOIC clip might not make good contact?

If someone had a similar case and solved it, I’d really appreciate your guidance. Thanks a lot!

[hoaca388]

Hi everyone,

I’m trying to read (backup) the BIOS from a GigaDevice GD25Q256DYIG (3.3 V) on a Dell Latitude 5400 (LA-G892P, 2019).

My setup:

• CH341A (black), hardware-modded to output 3.3 V (because at 5 V it wouldn’t read).
• NeoProgrammer on Windows (the CH341A is detected fine).
• SOIC8 clip (to avoid desoldering).
• I also have a 1.8 V adapter (only to test behavior; I know the chip is 3.3 V).

Problem:

• With the CH341A plugged in, NeoProgrammer sees the programmer.
• The moment I clip onto the BIOS chip, Windows plays the USB-disconnect sound and the CH341A drops off the bus.
• If I insert the 1.8 V adapter, the USB doesn’t disconnect anymore, but of course the chip won’t read because it needs 3.3 V.

So far I’ve tried many things (different USB ports/cables, slower SPI speed in NeoProgrammer, etc.). My suspicion is a power/voltage/current issue or in-circuit loading from the motherboard.

Questions / Help wanted:

1. Has anyone seen this exact behavior (CH341A disconnects when clipping on at 3.3 V, but stays connected at 1.8 V) and found a fix?
2. Is this likely the motherboard back-feeding / overloading the 3.3 V rail when I inject 3.3 V from the CH341A?
3. Would you recommend isolating VCC (lifting pin 8) or just desoldering and reading off-board?
4. Do I need pull-ups on /WP and /HOLD, or any specific wiring tweaks for this model?
5. Any checklist to confirm proper pinout/contact on WSON-8 (if this package is WSON on this board), since a SOIC clip might not make good contact?

If someone had a similar case and solved it, I’d really appreciate your guidance. Thanks a lot!

Have you removed the main battery and cmos battery ?

[Alejandro Luo]

Have you removed the main battery and cmos battery ?

all battery had been removed and the cmos battery also

[luisvalenzuelajr]

Hello, I need to fix the TPM error in this BIOS, please.
Dell 5400, MB g891p 1.0, ST GTFRV6S

[Wood204]

Help please

I have a CH341A black programmer and using a clip, but the bios chip it isn't recognise. It is a winbond 25q256jveq in a laptop dell latitude 5400. I used CH341A 1.43 version and NEO Prog 2.2.10

Thank you for the reply