no bootable device

detected. What should I do?

If your computer is displaying the message "no bootable device detected", it means the computer is unable to find a device containing the operating system to start up. There are a few potential solutions to this problem:

1. Check to make sure that there are no external storage devices (such as USB drives or CDs) plugged into your computer. Sometimes the computer will try to boot from these external devices instead of the internal hard drive.

2. Check the BIOS settings to make sure that the correct boot order is set. The BIOS is the program that controls the hardware on your computer, and the boot order is the sequence of devices that the BIOS will attempt to start up from. Typically, the internal hard drive should be listed first in the boot order.

3. Check to make sure that the hard drive is properly connected to the computer. Sometimes the hard drive can become loose or disconnected for various reasons, which can cause the "no bootable device" error.

4. If none of these solutions work, you may need to repair or replace the hard drive itself.