Hp elitebook 840 g5 bios password

[hoaca388]

Should I post the motherboard’s serial number and model number? The serial number on the back of the laptop doesn’t match the one shown in HP System Information—I think the previous owner might have replaced the back cover. Should I reassemble the laptop and send you the serial number from HP System Information instead?

Post the serial number on the back of the laptop.

[Bigherc07]

Post main bios file.

Should I post the motherboard’s serial number and model number? The serial number on the back of the laptop doesn’t match the one shown in HP System Information—I think the previous owner might have replaced the back cover. Should I reassemble the laptop and send you the serial number from HP System Information instead?

[Bigherc07]

Post main bios file.

Here is the main bios file. thank you in advance.

[SMDFlea]

I've been preparing to unlock the BIOS password on my EliteBook 840 G5 for about a month. I got a T48 programmer along with a WSON8 8x6 adapter, but after removing the motherboard, I was surprised to find that the EC chip was actually in a WSON8 5x6 package.

From what I've read on this forum, only the 16MB EC chip is compatible with RCUnlocker, and since I don't have an adapter for this chip, I'm stuck. Ordering a WSON8 5x6 adapter from AliExpress would mean waiting at least 20 days, so I was wondering—do I have any other options?

Can I unlock the main BIOS instead, or is the EC chip the only way to remove the password? Any advice would be greatly appreciated!

Solder wires to the pads https://www.badcaps.net/forum/troubl...58#post3223258

[hoaca388]

I've been preparing to unlock the BIOS password on my EliteBook 840 G5 for about a month. I got a T48 programmer along with a WSON8 8x6 adapter, but after removing the motherboard, I was surprised to find that the EC chip was actually in a WSON8 5x6 package.

From what I've read on this forum, only the 16MB EC chip is compatible with RCUnlocker, and since I don't have an adapter for this chip, I'm stuck. Ordering a WSON8 5x6 adapter from AliExpress would mean waiting at least 20 days, so I was wondering—do I have any other options?

Can I unlock the main BIOS instead, or is the EC chip the only way to remove the password? Any advice would be greatly appreciated!

Post main bios file.

[Bigherc07]

I've been preparing to unlock the BIOS password on my EliteBook 840 G5 for about a month. I got a T48 programmer along with a WSON8 8x6 adapter, but after removing the motherboard, I was surprised to find that the EC chip was actually in a WSON8 5x6 package.

From what I've read on this forum, only the 16MB EC chip is compatible with RCUnlocker, and since I don't have an adapter for this chip, I'm stuck. Ordering a WSON8 5x6 adapter from AliExpress would mean waiting at least 20 days, so I was wondering—do I have any other options?

Can I unlock the main BIOS instead, or is the EC chip the only way to remove the password? Any advice would be greatly appreciated!

[jiten1885]

Thank you SMDFlea . Now I know the rules. and Thank you lapfix. I will try it and get back to you.

[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.

[lapfix]

Looking to remove password from this HP 840 G5 bios.

Try and GIVE feedback

First boot load bios factory defaults, save and exit and then at the next boot disable security options
You must fill your DMI manually.

[jiten1885]

Looking to remove password from this HP 840 G5 bios.

[SMDFlea]

hi, please help me remove the admin lock.
840 g5
sn: 5CG9152N96

THANKS IN ADVANCE

Read the post above yours, use RCUnlocker https://www.badcaps.net/forum/troubl...23#post1622423

[GB1999]

hi, please help me remove the admin lock.
840 g5
sn: 5CG9152N96

THANKS IN ADVANCE

[madmanaic73]

OK, so everything worked out just fine, let me share my learnings from this:
1. HP 840 G5 more often that not seems to have password configured in the EC chip on the backside of the motherboard, in my case a Winbond 25Q128JV SMD chip.
2. This chip can't be read or programmed when connected to the motherboard, there seems to be a protection kicking in. Must be desoldered.
3. The chip can easily be read and programmed with CH341A programmer when desoldered, and RCUnlocker worked on the first try.
4. Beware to read more than once and compare readouts, also after programming, read back several times and file compare.
5. Be very careful when resoldering to use enough flux and flow the connecting pins and pads generously.

All in all it worked great, but it was tricky to arrive at this solution due to the contradictory information in this thread. At least this procedure should work for all devices with the same motherboard type than mine.
Thanks rddube for the help to arrive at the right answer.

[rddube]

rddube I was hoping to not have to desolder the 16MB chip (since I successfully connected to the 32Mb using wires). Just to double check: How did you connect to the 16Mb chip? Desolder? Clip? Wires? It seems that with wires my flash device says (no connection to IC) and at the same time a LED is flashing yellow on the motherboard (probably powered backwards from the chip flasher).

The 16mb chip is on the other side of the motherboard, so you are going to take the motherboard out. I always desolder the bios they are so easy to desolder and use one of these attached SOP8 to DIP8 (I have different sizes) and resolder onto the board. You can always use the little board that comes with the CH341 programmer - just make sure you've got pin 1 on pin 1, etc. I never use the clips they are junk as far as I'm concerned.

[madmanaic73]

rddube I was hoping to not have to desolder the 16MB chip (since I successfully connected to the 32Mb using wires). Just to double check: How did you connect to the 16Mb chip? Desolder? Clip? Wires? It seems that with wires my flash device says (no connection to IC) and at the same time a LED is flashing yellow on the motherboard (probably powered backwards from the chip flasher).

[madmanaic73]

Read the previous post to yours. I mistakenly reported it as a Lenovo 840 G5 but it is an HP 840 G5. Good luck!

That is what led up to these questions, I suspect you are right, but in other replies in this thread it is clearly stated to be the 32Mb chip that should be patched (which seems impossible to me using RCUnlocker). Seems a bit inconsistent and would be interesting to understand if this is different in different versions of the 840 G5.

[rddube]

Hi everyone,
I have a HP 840 G5 that is admin password locked (abandoned from a company). I have been trying a good way to unlock it and reading up on almost the entire thread here it seems reading out the 32MB chip patching it with RCUnlocker is what most people say. I did this (was a Winbond 25Q256JVEQ chip) and to my surprise RCUnlocker told me that the 32MB file was not compatible and I should try a 16MB file. My two questions to anyone who could bring more insight:

1. Is RCUnlocker indeed not compatible with 32MB BIOS files? It seems a lot of people have run it successfully
2. Is it so that SOME 840 G5 are password locked in the 32MB BIOS and others in the 16MB? It seems very inconcistent.

Thanks in advance!

Read the previous post to yours. I mistakenly reported it as a Lenovo 840 G5 but it is an HP 840 G5. Good luck!

[madmanaic73]

Hi everyone,
I have a HP 840 G5 that is admin password locked (abandoned from a company). I have been trying a good way to unlock it and reading up on almost the entire thread here it seems reading out the 32MB chip patching it with RCUnlocker is what most people say. I did this (was a Winbond 25Q256JVEQ chip) and to my surprise RCUnlocker told me that the 32MB file was not compatible and I should try a 16MB file. My two questions to anyone who could bring more insight:

1. Is RCUnlocker indeed not compatible with 32MB BIOS files? It seems a lot of people have run it successfully
2. Is it so that SOME 840 G5 are password locked in the 32MB BIOS and others in the 16MB? It seems very inconcistent.

Thanks in advance!

[rddube]

Ok, so figured it out and will post the solution in case someone has the same issue. Unlocking the 32MB file did not to the trick. Used RcUnlocker on the 16MB chip and that did the trick it is now unlocked. Many thanks to all of you and thanks Peste!

[rddube]

Not sure if this is important, but when I boot and press F10, before getting the Bios Administrator Password screen, I get this screen which say PROPERTY OF GHD then the HP logo and then the message Protected by HP Sure Start.

I tried looking for the string "PROPERTY OF GHD" in both the 16MB and 32MB files but did not find anything. Not sure what to try next?