Hard disk not found, I don't know why

[PCNeedsHelp]

A week ago my computer didn't turn on, then a couple days later it turns on but it says: "No hard drive installed. Please check that the power and data cables are connected properly." And I don't know why. I checked inside the cpu if the cable was attached and it was. But I still tried unplugging and replugging it in, and I think the cable mightve disconnected from inside, cause the red wire was a bit loose when I went to check inside the cpu. Can someone tell me what the problem is and how I can fix it please?

[TheOldMan]

First lets explore the possibility that the hard drive has failed. If you run the Diagnostics routine, it will tell if the drive is still healthy or needs to be replaced.

To run the Diagnostics routine, Start tapping the Esc key BEFORE starting the PC and then press the start button.
Keep tapping the Esc key until a popup menu shows. Then pick Diagnostics from that popup menu, F2.
Report back with the results. Either the drive needs Windows repaired or the drive needs to be replaced.

[guru151]

i am experiancing the same issue on one of my computers, i ran the diagnostic and it continues to say " no hard drive installed please check power and data cables" this is the only error message i get, 

[TheOldMan]

To @guru151 

That would most likely mean the hard drive has failed.  Since there is no mention of a model number, it is difficult to offer additional help, other than replace the hard drive. 

BTW: now would be an excellent time to upgrade to a SATA SSD or even a M.2 drive if your PC is capable.