Originally Posted by Zephyrus
I used the "check" command to check both the bootloader and mbr.....both return okay....
Is it possible to flash a new bootloader img to fix it?
Or are there any other tool, such as atk can be use?
ATK is for K3 and earlier, and MfgTool is for K4/K5. You would need to create a new MfgTool profile to flash the bootloader. The current MfgTool profiles are only for booting temporarily to main/diags/fastboot.