FYI, see other post here where I already responded:
Reset to original purchase - Apple Community
You did not mention in the other thread you started which I just linked here that an AppleID (aka Apple Account) was tied to this device. Is an AppleID active on this device which is preventing access with an Activation Lock? If so, then that is a whole other issue.
Activation Lock for Mac - Apple Support
You may want to review the following article for tips when asking for assistance online:
Writing an effective Apple Support Communities Question - Apple Community
FYI, in the future, please do not make multiple threads for the same issue because it gets very confusing for everyone involved. And it wastes the times of volunteers who try to assist since we may not be aware of what has been discussed & dismissed in the other thread.