Ok, I have a Lenovo Flex 4 15" 2in1 laptop which I had two years but after the first year it would not fully load maybe because of connection, (maybe). Yes it will still power on. Now after some time I realized my Bios setup did not recognize are was not communicating with the hard disk . At first, thought hard drive was bad but it wasn't. Have anyone had this issue and can help me. Your help will be a blessing too me.