My ASUS M509DA laptop (AMI BIOS) has dropped out the boot options and there is no line under the BOOT menu to reinstate the options. How do I fix this, thank you?
I have already tried both booting from a bootable DVD and a memory stick to no avail. The BOOT MENU still shows no drives and can not be updated in the BOOT MENU's Boot Order line (line greyed out). Laptop boots to WIN 10 from internal SSD
Try removing your storage device and turn your system on, you see the missing options then change the device slots and connect. Then turn you system on again.