Bought a used logic board, firmware password in it and unknown

[AlfredoM]

Bought a used logic board, firmware password in it and unknown.
AASP Apple Service cannot unlock due to lack of proof of ownership (invoice or proof of purchase).

 

I now have 2 logic boards here:
1 piece A1419 820-00291-A with EFI Winbond (legs) chip
This one has the firmware password in it.

 

The other is an A1419 820-00134-A where the SMC chip is defective
Error: PFM006 chews Apple diagnostics with D key. In Catalina macOS, which was the only one that could be installed,

after hours of installation the Inter Power Gadget Tool shows that the processor only clocks at 800 MHz and Bluetooth no longer works.
There is an MXIC Efi CHip on it.

 

Now my plan is to replace the working EFI chip MXIC from the A1419 820-00134-A into the other logic board A1419-820-00291-A with

the Winbond chip (where the unknown firmware password is dri).

Are the 2 EFI chips compatible?

 

I once put 2 photos of the EFI chips here.

 

Or you can Ask:
If you remove the EFI chip in the iMac, is it possible to start the iMac with an EFI Partition in the Harddrive, like with a Hackintosh?