disable Bootguard via replacing pch??

I have a Dell Q170 mainboard, with bootguard enabled (Verified Boot and Measured boot)
Can following steps disable bootguard?

1.disable bootguard via Intel Flash Image Tool and flash BIOS.
2.desolder Q170 pch chip and solder a new one.
3.power on


by setting ME Kernel → Reserved = yes via Flash Image Tool, ME is disabled now, and my modified BIOS is accepted.
But another problem is…BIOS recovery menu popup after power on…