I have 7hp 600B Microtower PC sets of in my organisation. one of these systems had a bad hard disk so i bought a new hard disk only to get a no boot disk error on the screen. so i put the disk in another hp 600B Microtower PC system and i got the same error report as the first one. after trying 4 different hard disks, i decided to test it on one of my dell system and it accepted the hard disk. which made me come to conclusion that my my set of 7hp 600B Microtower PC system seems to be selecting drives. I need this system to work so i need help and advice.
Also, how do i switch off the ambent light below my touch smart desktoP "product name VA284AV#ABA WINDOWS 8"?