Okay, thanks for your patience.
This is most likely a hardware failure within the BIOS chip on the motherboard. As you may know, there's a chip within your computer that has a program on it (the BIOS) that controls the initial start up functions of the computer before handing control over to Windows. This chip retains some amount of control even after Windows has started up, so if it fails, then the computer will stop operating correctly.
When you first turn your computer on it's the BIOS that initiates that start up. If it's not working correctly, then it can't properly turn control over to Windows and you also won't be able to make any changes (such as via the F2 or F12 keys). And that's what's happening to you right now: You're not even getting to the Windows portion of the start up process. You are getting held back by what's an apparent BIOS malfunction.
The other possibility is that your hard drive failed and the BIOS is getting confused when it goes to look for the hard drive and isn't finding it. I may be looking for the hard drive, failing to find it, and then freezing up. But that is less likely.
Since the troubleshooting you've already tried has not resolved the program, the next step would be to either pursue a warranty claim (if the machine is under a year old) by calling the Lenovo Customer Service line at(###) ###-#### Otherwise, you will need to take the machine to a local shop and have a technician perform a hands on diagnosis.
If you have any other questions on this for me, just let me know. I know you're in a hurry to go though.
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