In some instances, installing alternative operating systems (like Ubuntu) can corrupt NVRAM, leading to a loss of BIOS access. Write Protection: OEM Samsung boards often feature BIOS Write-Protection
| Issue | Possible Fix | |-------|---------------| | No display after CMOS clear | Re-seat RAM, reset BIOS by removing CMOS battery for 10 min | | “Invalid system disk” | Change SATA mode to AHCI / Legacy | | BIOS password locked | Need Samsung factory backdoor (not publicly shared) or EEPROM reprogramming | | Fan always full speed | Reset BIOS to defaults; check thermal sensor in BIOS monitor | Samsung B75s1 Bios