HP EliteDesk 800 G2 SFF password BIOS dump

[SMDFlea]

HP EliteDesk 800 G2 no display plz help me

https://www.badcaps.net/forum/troubl...before-posting

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.

[ayman elsherif]

Hi friends Need to see my 800g2 bios dump
NO SCREEN only fan spining

[SMDFlea]

Hi friends Need to see my 800g2 bios dump
NO SCREEN only fan spining

Read the post above........

[jacviolin]

I tried to flash the dump of this post but it didn't work.

I’m trying to unlock the BIOS on my HP EliteDesk 800 G2 SFF. The computer works fine, but the BIOS setup (F10) is locked with an Administrator password that I don’t know. I can still boot with F9, but I need to get rid of the password.

What I’ve done so far:

• I have a CH341A programmer with SOIC8 clip.
• I successfully read the 16 MB BIOS chip and saved my own dump.
• I opened it in UEFITool and located the NVRAM.
• I tried cleaning the NVRAM (filling with FF) and also keeping the header and cleaning only the body.
• After flashing those modified dumps, the PC turns on but I get the message:
  “The Shared SPI Flash was recovered from Embedded Controller Flash”
  and then the password is back again.
• Flashing back my original dump makes the system work normally again (but still locked).
• I also tried flashing the official BIOS from HP, but the system didn’t boot (likely because the HP file isn’t a full 16 MB image).

What I’ve learned:

• The password is in the NVRAM of the BIOS, but this model also has an EC (Embedded Controller) that seems to rewrite it if it detects changes.
• So just cleaning NVRAM with my CH341A isn’t enough, because the EC puts the password back.

What I need:

• Guidance on how this model can really be unlocked.
• Do I necessarily need to program the EC as well? If so, what’s the practical way to do it?
• Is there a way to edit only the password variables inside NVRAM (so the EC doesn’t overwrite it)?
• Or does this model only work if BIOS + EC are both flashed with clean dumps?

At this point I just want to finally get this machine unlocked and usable. Any advice, tips, or clean dumps known to work for this model would be very appreciated.

Thanks a lot in advance.

Help Meeeee

[peste]

try..