HP Elitebook 8470p 6050A2466401-MB-A02 B7D79AV UMA fFPR 8470p SOIC16-WINBOND-25Q128BVFG Clean Me 16MB bios bin
Not work with this way the only way to unlock it is to read bios chip with eeprom programmer and post here bios backup
Thank you ! unfortunately ,it's still have same issue. I have been changed the Speaker. So I think there is a problem with the BIOS .