Hi, I have already tried this method, error 0x86 occurred when "hpbi103 read slp" and "hpbi103 write slp on". This laptop was released with the built-in ACPI MSDM Win8 license in the BIOS and does not have the ACPI SLIC 2.1 BIOS.
Using HPBQ193.exe with advanced features, I'm exported the EEPROM to a ESCD.DAT file using menu item "L", then changed 0xF9 to 02 and 0x86 to 03 in ESCD.DAT, then imported the EEPROM using the "M" menu item from new ESCD.DAT. Now I have SLIC2. 1 in BIOS. Many thanks.