Hp elitebook 840 g5 bios password

[m.sabry2110]

Serial Number : 5CG8494FHJ
Description : HP EliteBook 840 G5
Password unlok

try

[bibi019]

Hi all i need clean file for tHis bios dump Hp elitebook 840 g5. i5 8 generation sn 5CG92229D3
yours
emergency

[hoaca388]

Hi all i need clean file for tHis bios dump Hp elitebook 840 g5. i5 8 generation sn 5CG92229D3
yours
emergency

HP EliteBook 840 G5 Base Model Notebook PC

[bibi019]

tHanks for tHe replay but tHe bios still locked it ask always for bios administrator password any Help

[motanya]

try

Worked, thank you

[rddube]

Hello everyone, need help in Bios unlocking this Lenovo 840 G5. I tried with the HP unlock tool on the larger Bios chip but it didn't work. So I am uploading both bios chips could anyone remove the bios lock? Many thanks!

[peste]

Hello everyone, need help in Bios unlocking this Lenovo 840 G5. I tried with the HP unlock tool on the larger Bios chip but it didn't work. So I am uploading both bios chips could anyone remove the bios lock? Many thanks!

try.. The 16 MB one remains the same.

[rddube]

try.. The 16 MB one remains the same.

Hi Peste, no that didn't work this is the screen I get when hitting F10

[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?

[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!

[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]

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]

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.

[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).

[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]

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.

[GB1999]

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

THANKS IN ADVANCE

[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