Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

[SMDFlea]

Thread merged.

[rex98]

Recently picked up an HP EliteDesk 800 G6 (Product 3E2E2US, Serial MXL1093CPH, Motherboard DA0F93MB6F0 Rev F) at Goodwill but the BIOS was locked. I desoldered and dumped both the BIOS chip (GD25B256D) and the EC chip (MX25L12873F) on my TL866II+. I ran the EC image through RCunlocker (it said it succeeded) and reflashed the EC chip. I also cleaned the ME Region of the BIOS using the guide from Level1Techs.

Unfortunately the machine no longer POSTs. The fan comes on at full speed as soon as I plug the machine in, then eventually ramps down, but that's it. No beep or flash codes at all. If I remove the EC chip, it does give the correct beep & flash codes, so it seems like the motherboard is ok. I've tried every combination of modified and original binaries for both chips; no change. I tried recovering the BIOS via a USB flash drive, but the machine doesn't even try to read the drive. I was unable to extract BIOS or EC binaries from the update executable (does not have the 'Copy' option). I found a couple of other threads for the Elitedesk 800 G6, but I don't know whether the EC or BIOS files in those can be used with my machine.

What did I do wrong? What do I do now?

flash both

[RecklessMaker]

Recently picked up an HP EliteDesk 800 G6 (Product 3E2E2US, Serial MXL1093CPH, Motherboard DA0F93MB6F0 Rev F) at Goodwill but the BIOS was locked. I desoldered and dumped both the BIOS chip (GD25B256D) and the EC chip (MX25L12873F) on my TL866II+. I ran the EC image through RCunlocker (it said it succeeded) and reflashed the EC chip. I also cleaned the ME Region of the BIOS using the guide from Level1Techs.

Unfortunately the machine no longer POSTs. The fan comes on at full speed as soon as I plug the machine in, then eventually ramps down, but that's it. No beep or flash codes at all. If I remove the EC chip, it does give the correct beep & flash codes, so it seems like the motherboard is ok. I've tried every combination of modified and original binaries for both chips; no change. I tried recovering the BIOS via a USB flash drive, but the machine doesn't even try to read the drive. I was unable to extract BIOS or EC binaries from the update executable (does not have the 'Copy' option). I found a couple of other threads for the Elitedesk 800 G6, but I don't know whether the EC or BIOS files in those can be used with my machine.

What did I do wrong? What do I do now?

[SMDFlea]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

hello, can someone help me and remove the bios password?

You must post the serial number,as per the rules.

RULES UPDATE for BIOS requests/offers *AVOID BANNING, READ BEFORE POSTING*
https://www.badcaps.net/forum/showthread.php?t=103569

.

[peste]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

hello, can someone help me and remove the bios password?

try..

[skypc86]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

hello, can someone help me and remove the bios password?

[kolabi]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

try..

Thanks so much
it worked like a charm

[Butterball7790]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

On my HP elitedesk 800 g6 mini. Do I use RC Unlocker on the Winbond chip or Gigadevice chip? Is the the Winbond chip the EC chip? Any help would be appreciated.

[peste]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

Hi, can anyone help me remove bios admin password for elitedesk 800 g6 mini.
i know it starts at address 37000 but dont know where to stop filling with FF.
Thanks in advance

try..

[kolabi]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

Hi, can anyone help me remove bios admin password for elitedesk 800 g6 mini.
i know it starts at address 37000 but dont know where to stop filling with FF.
Thanks in advance

[hoaca388]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

Which chip is the EC on? I have 2 layouts -
1. 25B127DSIG named PRVROM XU6b
and
2. Winbond 25Q256JVFQ (32MB) bios

Thanks for the help

Here

[Dubby]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

I have the same BIOS password problem. I have Neo and the unlocked file to flash the chip, but it does not show me anything in the Device window. Can you assit or point me in a direction that gives instructions? Thank you!

[dips82]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

Which chip is the EC on? I have 2 layouts -
1. 25B127DSIG named PRVROM XU6b
and
2. Winbond 25Q256JVFQ (32MB) bios

Thanks for the help

[hiroshxd]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

i have the solution. thanks to all

[hiroshxd]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

Upload your dump file

I do not know why. But the program shows me 2x 16 mb chips. I checked the connection twice. Doesn't look right to me? I've uploaded both. I'm a total newbie sorry.
maybe the wrong chip.

[Arrow16]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

Good evening, I hope you are so nice and can help me too. My device doesn't remove the password either. Can I try the same file or does it differ from device to device?

Thanks.

Upload your dump file

[hiroshxd]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

Try and give feedback

Good evening, I hope you are so nice and can help me too. My device doesn't remove the password either. Can I try the same file or does it differ from device to device?

Thanks.

[Arrow16]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

Try and give feedback

[MCRacer]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

I am also having Problems, tried RC Unlocker and still had a locked BIOS. Attached is my EC Chip bin file.

[dg01]

Re: Help HP Elitedesk 800 G6 Mini PC LOCKED BIOS

Find attached EC file for the HP Elitedesk 800 G6 Mini PC unlocked.