HP Elitebook 645 G10 BAD BIOS

[Allan Larson]

HP EliteBook 645 14 inch G10 Notebook PC
CTNumber_6MBME0NWYIU0II
Serial_5CD351K5LJ
Sku_8J038EC#ABF
Build Id_23WWKNBZ602#SABF#DABF
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawcAeMfPgSguhKjhk8mEmVn7nWpDpnpqprqMqz.tY

What method did you use to unlock this? I'm using RCUnlocker and it says I need to use a 16MB chip but this 32MB W25Q256JV chip is the only one I see. Thanks!

[shiriff47]

HP EliteBook 645 14 inch G10 Notebook PC
CTNumber_6MBME0NWYIU0II
Serial_5CD351K5LJ
Sku_8J038EC#ABF
Build Id_23WWKNBZ602#SABF#DABF
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawcAeMfPgSguhKjhk8mEmVn7nWpDpnpqprqMqz.tY

Thank you very much i found the solution.
i will try to learn by comparing your unlocked dump with my locked one
Thanks again

[hoaca388]

Can anyone help me to unlock hp EliteBook 645 G10
motherboard : DA0X9TMB8D1 REV D
S/N : 5CD351K5LJ

HP EliteBook 645 14 inch G10 Notebook PC
CTNumber_6MBME0NWYIU0II
Serial_5CD351K5LJ
Sku_8J038EC#ABF
Build Id_23WWKNBZ602#SABF#DABF
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawcAeMfPgSguhKjhk8mEmVn7nWpDpnpqprqMqz.tY

[shiriff47]

Can anyone help me to unlock hp EliteBook 645 G10
motherboard : DA0X9TMB8D1 REV D
S/N : 5CD351K5LJ

[SMDFlea]

Please do not offer any help to members if they have not posted the serial number

[SMDFlea]

RULES UPDATE for BIOS requests/offers AVOID BANNING, READ BEFORE POSTING
https://www.badcaps.net/forum/troubl...before-posting

You MUST:

• Provide the full machine model number, serial number (or Service tag, SNID) and the board model number (see https://www.badcaps.net/forum/showthread.php?t=88758 ) ,The serial number, make, full model number, motherboard model and revision (except QR codes) must be written/typed at your request as per the rules. Not as a picture, part of the file name and so on.

[alfredposadas09]

after flash first boot go to bios press f10 then reset default settings.. if u don't do this the password will not be remove

flash it again and follow this steps

[alfredposadas09]

After all I enter in th bios why password appear again how

after flash first boot go to bios press f10 then reset default settings.. if u don't do this the password will not be remove

[Muhammad Faizan]

just flash the winbond dont touch the gigadevice

After all I enter in th bios why password appear again how

[Muhammad Faizan]

ok tomorrow i will check and update you

[alfredposadas09]

hi master

This is my HP EliteBook 655 G10 in bios password can any one unlock my laptop?

just flash the winbond dont touch the gigadevice

[Muhammad Faizan]

hi master

This is my HP EliteBook 655 G10 in bios password can any one unlock my laptop?

[RWS93]

Ok sorted. 22ohm resistor worked fine. Machine runs on original BIOS. I will later try the BIOS provided above to unlock it.

[RWS93]

OK so I am an absolute idiot. I do hot air soldering very often but turns out this time I made a mistake. I allowed the idea for this in my head and I started thinking I could knock a component off. I could not find a schematic or board view but I found HP YT channel where they are posting maintenance videos about their machines. There was a picture of the motherboard. On this picture ROM is installed in some sort of a socket unlike on my board where it is soldered but everything else is the same. I noticed I must have knocked off a resistor when desoldering the chip. This resistor has been connected to pin 1 of the ROM. I found that on the other side of the track the voltage goes up to 3.3V max so I decided to replace the resistor with a soldered bridge. After doing so on original BIOS picture laptop wakes up. Keyboard backlight turns ON, power LED turns ON, all the voltages on the board are present, CPU getting warm but no display backlight and no picture. After about 10 sec the machine restarts.

I guess the bridge is not enough and replacing that resistor is essential. There is no board view no schematic so I do not know the value of the resistor. I found schematics for other laptops with similar ROM and design with the resistor connected to pin 1. Normally these resistors are within 22 - 220 ohm. I will give it a go later today. Any other ideas on the resistor value? Thank you.

[RWS93]

Ah I think I understand now. Is it the security register? In AsProgrammer it does not show after I detect the chip... but in NeoProgrammer it does. It is called "security register1". It is exactly of the size 1KB - the extra data at the beginning of your BIOS you prepared for me. Hmmm maybe I just used AsProgrammer initially to work with this laptop and erased the whole chip including the security register. But when making a backup it did not read the security register as my original images are only 32 768KB? Later I wrote just the backup 32 768KB leaving the security register empty? And this is why it won't boot? Hmmm... I took that 1KB of the BIOS you provided and wrote it to the "security register" of the chip. Now the main BIOS image goes in the 32 768KB part. Will see... hopefully this will sort the issue. I think it is quite a logical reasoning here.

[RWS93]

try

Thank you very much for preparing this image for me. It seems like it is bigger than the original .bin: 32.769 KB (your image) vs 32.768 KB (original image). Maybe the difference is in the first bytes of the file as I showed in the screenshot?

[danito]

Hi,

I am having problems with the following laptop:

Could anyone please help?

try

[RWS93]

Hi,

I am having problems with the following laptop:

Brand: HP
Model: Elitebook 645 G10
Motherboard model: DA0X9TMB8D1 REV: D

It is an AMD 7000 series CPU laptop.

The problem is this: computer has came with BIOS password and also Windows locked to a company domain. I have done what I would normally do in such case:

1. Desoldered BIOS chip
2. Put it into the programmer
3. Made two .bin backups of original bios
4. I found a fresh BIOS image on the internet
5. Write the new fresh BIOS image to the machine

After I have done this the machine would not boot. It starts automatically when power is plugged in then:

1. F5 key LED lights up Orange
2. Power LED flashes White/Orange
3. Machine turns on and off like this a few times
4. Finally the F5 key LED turns off and the Power LED stays white
5. If I press power button in such condition I get 7 flashes on the CapsLock LED
6. Laptop reacts to the power button: if I press it long enough the machine turns off but then turns ON automatically and the cycle repeats

Under such condition I can see voltages on the motherboard going up: 3.3v, 5v are ON all the time. For a second or two I do get 1.8v for RAM and one of the CPU power stages (the high resistance one) goes up to 0.8v. Later these voltages go down and only 3.3v and 5v remain ON.


I thought this was just a corrupted image I downloaded from the internet. So I written back the original image. After soldering the chip back to the laptop I still get the same issues as described above. Power light flashing white / orange, Caps Lock LED flashing 7 times. Same voltages on the board.

I have checked the BIOS chip few times and it is programming and verifying fine each time. The soldering is done right: chip is always soldered back correctly with all the pins making contact. No components has been blowed off the board with hot air. Soldering has been done very carefully. I do not think my original BIOS would be corrupted. It has been read on two different computers but using same programmer (I have made two copies).

What could be the problem? I have seen on another forum someone having simillar problems with G8 and repaired by flashing the EC ROM.

I have attached both images of BIOS and EC ROM.

Could anyone please help?

[RWS93]

Hi, have you ever managed to get this one sorted? I am having a strange case with this laptop. So there was a BIOS password on it. I attempted to remove it by flashing the chip with the .bin provided above "HP EliteBook 645 G10_new_4MATIC.rar". I have also managed to get just blinking capslock. I have loaded back my original bios image and I still get flashing capslock. Machine has been booting just fine before. I have only taken off the chip to program it. No components have been knocked off or anything like this. I am 100% certain I have loaded the origina image back. Still just a flashing capslock. 3V and 5V are on. Rest of the voltages comes on for a sec and then off. Capslock is flashing 7 times. How it is not working with the original image back on the chip? How is that possible... Anyone having any experience with this device?

[hoaca388]

Yes, you can try