Lenovo laptop with Windows 7 OS. The laptop shut down while plugged in overnight. I have removed the battery and let it sit for hours to cool/reset. Upon power up, the hard drive light comes on for 2-3 seconds, then goes off. Sometimes the screen flickers white for another 2-3 seconds, but the OS never boots up. I have removed the hard drive and plugged it into another computer via a SATA cable. I was able to read data. The drive appears to be working. I ran Malware Bytes and it cleared off some suspect files (PUP.FunWebProducts and PUP.MyWebSearch). I have a log file to post if helpful. When I put the hard drive back into the laptop, I get the same result as before. I made a recovery disc on another Win 7 computer and attempted to boot the Lenovo from the disc, but still I get the same result. I have tried pressing F8 at start up, but still no joy. Is this a BIOS issue, failed HD controller, or something else?