Check if boot guard enabled at PCH or not, if you have not checked yet, it may not have key burned into FPF. If not, then you can disable at ME FW side and carry on
MEINFOWin.exe -verbose
Check end of report, if you see Measured or Verified boot enabled at Left/FPF side then yes you cannot edit anything in boot guard covered area. I’m sure you know all this DeathBringer, just not sure if anyone looked at MEINFO report on these systems yet to confirm if FPF burned in or not
It’s already done:
Bummer to see 
Well, I guess that shuts this down for other editing
Such a shame, but to be honest, apart from the ES cpus (which is a shame), 906EC doesn’t include much of interest as most of the CPUs are unlocked multiplier K models and you really wouldn’t get much overclocking headroom on these dell boards and next to no options in BIOS anyway 
The only two CPUs that unfortunately won’t be supported and aren’t K models : i5 9400F,i5 9400
The F model has no integrated GPU so useless for a Micro PC but could be used in a SFF I guess with a low profile GPU.
Still a huge achievement and again thanks to both of you !
@Lost_N_BIOS
Did you know which program should I use for lzma-compressing to get the same result as in BIOS?
I’ve tried some version of lzma.exe (from LZMA SDK Igor Pavlov), but length of result does not match the BIOS.
OK. I need LzmaCompress based on LZMA Utility 18.05 by Igor Pavlov
or lzma.exe e -d24 -fb32 inputfile outputfile
Good luck DeathBringer! I’ve never seen it possible, but I’ve also never seen anyone try either. At least with programmer here they can recover easily!
Yeah i’m willing to test if needed but wouldn’t be able to actually test the i9 9900T ES as I don’t have one 
You can test BIOS if brick or not, since you have programmer. So that would really be all that’s needed to confirm, if working then I bet his CPU related edits will be OK 
OK. Please make BIOS dump by your hardware programmer.
@DeathBringer Here it is, full 32MB hardware dump of BIOS that I had flashed previously with 012020 ucodes
By your hardware programmer.
@DeathBringer Ok I will perform the flash after work, will get back to you with results in a few hours
I seem to have an issue with my SOIC16 clip for hardware flasher, been trying for 30 mins to get a good contact but unable to redump and consequently reflash at the moment - will order a replacement and let you know
EDIT : it’s working again ! flashing now…
@DeathBringer
Results are in :
Flashed to test ROM → unable to boot → 2 amber blink then 5 white blink
Flashed back to my backup dump & was able to boot again no problem
I am trying to flash my 7060 in Linux using FPT. Any idea why I get the following error?
Warning: Fail to read FW Status Register value.
Error 7: The function "GetSystemFirmwareTable" failed with Windows Error Code: 4.
FPT Operation Failed.
did you set the jumper on motherboard to service mode ?