Hello everyone,
I have an HP Pro Desk 800 G3 SFF and would like to undervolt it to save power. Is this possible with the original HP bios? I have not found any options in the BIOS and wonder if there is a hidden menu. I have already tried the key combinations that are available on the Internet, but they did not produce any further settings for undervolting.
Many thanks
BADJACK
BADJACK80
Member
Last Activity: 12-14-2023, 09:35 AM
Joined: 03-22-2020
Location: Germany
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HP Pro Desk 800 G3 SFF / Undervolting / Hidden BIOS ?
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
It's done.
As written, I played a stick with NbDmiFit-2.13 from the [URL="https://www.badcaps.net/forum/showthread.php?t=69204"]forum here[/URL] and booted from the stick via UEFI.
The only thing I had to do in advance was an update of the TPM.
After the update, I was finally able to take the appropriate steps.
I want to thank everyone for the help. Thanks alot 
Re: HP Probook 650 G2 won't turn on after bios chip replacement
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
I did it as shown in the Youtube video but I get the error message (see attachment).
I could also start Windows from a stick and start it with wndmifit. The data from me are already available.
What am I doing wrong?...Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
Is there a guide on how to do exactly with the nbdmifit. I found a guide but it didn't really work with this. It is now in "Not Committed Mode" again.Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
OK. And what do I do with the error message. Should I let the counter count down and see if it works then?Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
I flashed your bios and saw that you have already entered all the data. But now I have this message again, is that correct?...Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
Here I have two dumps that are identical according to HexEditor. I have now soldered cables directly to the Eprom. Unfortunately I do not have an original backup. I had a biosfile from the Internet with which the laptop went back on at least. I will now flash the lapfix file again and fill it with the data...Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
Yes i use a clip. I didn't unsolder the chip.
Is there no way to feed an original HP bios with the appropriate data and then flash the finished biosfile?Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
Should I do another dump?
:::: EIDT :::::
NEW DUMP...Last edited by BADJACK80; 04-09-2020, 01:39 PM.Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
Here is the dump with all entries...Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
Your Bios...Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
Thanks for the information. I have entered all the data. Now this message comes...Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
I find only this Info on Partsurfer...Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
What do I have to enter for Feature Byte and Build ID? I have entered all other values, only with the two I am not sure what needs to be put in here. Or can I enter any values here?
For the file the notebook starts up and is in programming mode.Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
The laptop does not start up with the other dumps, i.e. the monitor remains black and only the fan turns up. I just flashed the dump of the identical model and now nothing works.Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
What I mean by that. When I flash this biosfile, the laptop starts up again. I also had other bios files with which the laptop did not start up. With the "bad" dumps, only the fans turned up after a while.
I once attached a dump of a completely identical device. Is from the same batch...Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
I have already tried the HP BiosConfigTool. That unfortunately did not work. Since the device is probably still in MPM "lock mode". I have already renamed the FSMC.bin to SMC.bin but then I get an error message when booting. I have now attached the pictures of the individual error messages.
Image 1 = current error message with the biosfile from the Internet
Image 2 = error message from wndmifit64
Image 3 - 5 = model and board names of the laptop
I will also attach...Last edited by BADJACK80; 04-09-2020, 08:46 AM.Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
I had already tried that, unfortunately without success. I worked through the individual points, but the Dos window closed again without changing anything.Leave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
SN/ 5CG6514SCH pcid = T4J10ET#ABD BID/ PFKCQ00WB561EA
I hope you mind pcid is ProductIDLeave a comment:
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Re: HP Probook 650 G2 won't turn on after bios chip replacement
I have a similar problem. I have an HP ProBook 650 G2. Unfortunately I don't have a dump from this notebook. I have uploaded a biosfile from the Internet with the ch341a. The notebook now starts up again but I cannot change the SKU, SN ...... because it is in MPM "Lock" mode. I've tried several things but nothing has worked so far. I would have all the data like SKU, BoardID and model. Maybe you can feed the existing bios with the appropriate data and I will then flash the customized biosfile.
...Leave a comment:
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