I was attempting to perform a clean reinstall of Windows 10 using a Windows 10 disc I own but for some reason it just froze during the installation. I deleted all partitions and data and formatted the hard drive on my desktop PC so the drive was completely clean. After I reinstalled the clean hard drive into the laptop and booted, the screen asked me if I wanted to boot from DVD like normal. Seeing as how the installation froze when I last tried in the laptop's own disc drive, I removed the disc and put it in and external disc drive, and restarted the computer again. Ever since I did that restart, the computer will not load past the Lenovo splash screen anymore, so it can't even get to the installation media. I've tried reinstalling HD, putting disc back into computer, using a Windows 10 media disc I already had lying around, replacing RAM with others I had around, disconnecting/reconnecting CMOS battery, and powering up/down the computer several times. The splash screen shows "Press F2 for enter setup, F12 to enter MultiBoot Menu", and next to it is a progress bar. I've tried these functions and every other function under the sun with nothing happening (BIOS wont open, screen doesn't change). The progress bar stops at the 50% mark and just sits there. It will not progress any further and I've left it like that for almost an hour. Any ideas on what is causing this or is this computer dead?