Hi:
You will have to contact HP technical support for assistance with obtaining a SMC.bin file for your PC.
Worldwide business PC phone numbers...
You can see if the phone number listed for your country is still valid to call them.
http://jp.ext.hp.com/lib/doc/manual/desktop/business_desktops/332630_007.pdf
If HP technical support can't or won't help you with that, unfortunately there is nothing else we can do for two reasons...
There are no back door passwords or codes for your PC's model series.
The only way to clear the password is to have HP send you the SMC.bin file.
As of March 1, 2019, we can no longer assist forum members with BIOS password recovery.
The forum rules of participation were amended to include this restriction.
https://h30434.www3.hp.com/t5/custom/page/page-id/hp.rulespage
4. Protect privacy - yours and others'.
d. No posts shall include instructions or directions intended to bypass or subvert security measures, including passwords, locking mechanisms, fingerprint scans, etc., or to bypass any safety measures.
If you cannot get a SMC.bin file, there is no way out of your dilemma other than buying a new motherboard for your PC, or a new PC.
