Remove icloud lock replacing which part?

Which part in the iPhone 4 can I replace to remove icloud lock? Would it be stored in the motherboard?

Please help! I can't restore/DFU mode or get the activation lock off!

(And yes the phone is mine I just forgot the info because I haven't used it in 5 years)

There's no point, it would cost more to replace the chips than to just buy a cheap iPhone.

Would just be easier to legitimately buy an iPhone than to hunt down parts for an older model by basically trial and error.

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