ASUS 550L new battery error to load

Jul 25, 2018
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ASUS 550L put in new battery, was directed to Aptio Setup Utility, as per directions went to

Security > Secure Boot menu and then Secure Boot Control then disabled

Also, under Boot menu > Launch CSM I enabled

Saved all changes and rebooted.

I tried various key suggestions FN,F4, F6, F8 etc and I still got referred to this message:

“Reboot and Select proper Boot Device or Insert Boot Media in selected Boot Device and press a key