The computer boot shows no boot device detected After entering the bios there is no option in the boot selection

This situation is most likely that the CPU or memory or graphics card is overheated, resulting in poor contact, or the hard disk connecting cable is loose.1, open the chassis, pull out the memory stick, with a rubber, it is best to wipe with alcohol, and use a brush to clean up the nearby dust. Then plug it in.

2, the CPU may be insufficient silicone, you can on a little silicone, and then clear the dust on the lower fan heatsink.

3, the graphics card, if it is a very large graphics card, often poor heat dissipation, clean up the dust is a must.

4, the hard disk at both ends of the connecting cable pulled down and re-inserted.