Ask Dell Optiplex Micro Plus 7020 Help needed: BIOS Clean ME and BootGuard Disable

[EletronicGroup]

Star Rating

5.00 star(s)

Dell Optiplex Micro Plus 7020
Reg Model: D15U


Service Tag: 8L0LG94
Express: 18685049224

Motherboard 232014-1 N25VK$HA

Hi everyone,

I'm facing a bit of a situation here and would appreciate some help from the experts.

I received a unit that was BIOS password protected. Unfortunately, during the initial dump, there was a verification error that I didn't catch in time, resulting in a corrupted original file. I tried flashing another BIOS chip with a different dump, but the device is now a "no power/no display" state.

Fortunately, I have an identical unit (same model, same motherboard version/revision) and I have just performed a verified backup of its working BIOS.

I need help with two things on this working dump:

1. Clean ME Region: To ensure compatibility and avoid initialization delays or shutdown issues.
2. Disable BootGuard: If possible, to allow the modified BIOS to run without signature issues.

I have attached the working dump from the twin machine below.

Thanks in advance for any help! And a friendly reminder to everyone: always double-check your verify logs before erasing the chip!

 

[admin]

Dell Optiplex Micro Plus 7020
Reg Model: D15U


Service Tag: 8L0LG94
Express: 18685049224

Motherboard 232014-1 N25VK$HA

Hi everyone,

I'm facing a bit of a situation here and would appreciate some help from the experts.

I received a unit that was BIOS password protected. Unfortunately, during the initial dump, there was a verification error that I didn't catch in time, resulting in a corrupted original file. I tried flashing another BIOS chip with a different dump, but the device is now a "no power/no display" state.

Fortunately, I have an identical unit (same model, same motherboard version/revision) and I have just performed a verified backup of its working BIOS.

I need help with two things on this working dump:

1. Clean ME Region: To ensure compatibility and avoid initialization delays or shutdown issues.
2. Disable BootGuard: If possible, to allow the modified BIOS to run without signature issues.

I have attached the working dump from the twin machine below.

Thanks in advance for any help! And a friendly reminder to everyone: always double-check your verify logs before erasing the chip!

file not fill data
backup two bios

 

[EletronicGroup]

EC + BIOS

 

[ThienBui]

EC + BIOS

 

[EletronicGroup]

Hi everyone,

I’m still struggling to get this board working. After flashing the donor BIOS with Clean ME, the behavior has changed but it's still not posting.

Current symptoms:The power LED stays on for a while, then it blinks (the system seems to reset), and it stays on again, repeating this cycle indefinitely. There is no image on the screen.

I have recorded a video showing this behavior and attached it to this post.

I suspect that since the BootGuard is likely enabled (Profile 4 or 5), the PCH is rejecting the donor BIOS because of a hash mismatch or missing hardware-specific keys in the TXE/ME region.

 

[EletronicGroup]

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