There should be a jumper near the battery, There is usually three pins so if you move the jumper across the other two pins this should clear the cmos.
It sounds like you have incorrectly set the bios
These days if you apply the optimize bios settings that is usually all you need to do.
If you can’t find the jumper take the battery out leave if for a minute then try again.
Hope this helps
It doesn’t sound like it is dead just slightly confused:crazy:
