Good day, dear hoaca388. Before disassembling the laptop, I made a backup using HpBCU "/GetConfig:". In the donor dump, I modified the HpMpm state using a hex editor and then restored the serial numbers using the same HpBCU tool. I'm still learning. I’m not doing this professionally. I just work at a recycling company, and sometimes we receive laptops, but usually it's Zebra printers and Elo monitors. So I don’t have much experience....