operating system not found acer aspire v5-431

dinesh 11

Estimable
Aug 2, 2014
3
0
4,510
I had an acer v5-431 cannot install windows 8 after I changed to legacy bios no access to bios so to reset I took out cmos but was a small spark in taking it out now I can't put back the battery notr open up it says operating system not found and no access to bios please help
 

Shaun o

Distinguished
When you reset the bios you defaulted it back to factory settings.
That means you have to go into the bios and re-select the type interface used for the hard drive with the os on it.
It says OS not found because the HD interface mode selected in the bios is wrong.

It needs to be set Sata or Ahci mode.
Save the settings before exiting the bios.
 

Col214

Estimable
Sep 24, 2014
1
0
4,510
Have exactly the same problem, caused when computer crashed. Rebooted Operating System not found.
Tried to enter BIOS only to find I am blocked by a password - I never set a password on my BIOS !!!