The likely scenario is that the hard drive went bad. Unless your friend that borrowed it REALLY did some damage to it from a software standpoint, its likely a failed HDD.
Open the BIOS menu and see if it detects a hard drive in the boot list.
In order to restore the use of the PC you will likely need to install a new hard drive and use a premade Recovery Media that you created or you will have to acquire one from the computer's manufacturer.
Open the BIOS menu and see if it detects a hard drive in the boot list.
In order to restore the use of the PC you will likely need to install a new hard drive and use a premade Recovery Media that you created or you will have to acquire one from the computer's manufacturer.