I have a Dell Inspiron 15.6" Laptop i5 1.6GHz 6GB 500 GB Windows 8 (i15RMT-5124sLV) and when I turn it on it says "No Boot Device Found. Press any key to reboot the machine_" and I dont know what to do. My SATA Operation is on <AHC I> and there's no other choices for the operation and I cant access Legacy Boot, I can only access UEFI BOOT. Someone please help
I would suggest you to enable the UEFI boot and secure boot to check if it fixes the issue with the computer.
Also, I would suggest that you run the diagnostics on the computer by following the steps mentioned in the video below and check if there is any issue with the hardware on your system.
Please check if the hard drive is detected in the BIOS. If the hard drive is detected in the BIOS then you will need to reinstall the operating system. Please private message the system service tag so that I can check and assist you further.