Mecer 214C-edu+ BIOS Reset

Tring to downgrade a client’s laptop OS and after these actions:

  1. Turning on - Bootup NumLock State
  2. Disable - Quiet Boot

When I save, Mecer 214C-edu+ will not boot. The challenging I am facing now is that there is no information regarding this problem or Mecer Bios Settings online for help me reset the laptop bios to default settings. Furthermore, there is no CMOS on board as research pointed.

For anyone who encountered these problems and managed to solve it, can you please share it.