X100e LCD monitor black

I left my computer running when I went to have lunch. When I returned about 2 hours later, the screen was black. I assumed that it was in hibernation, but the screen did not reapper when I opened and closed the lid or when I pressed the start button. The start button was backlit green as if the computer was on. I disconected the power supply and removed and reinserted the battery but when I restarted I had the same condition.
Yesterday, just to be sure, I plugged in an external monitor and when I started the computer, I had the startup repair screen. After a while, startup repair informed me that it could not reapir the condition and gave me the option of starting windows normally. When I did this, the LCD screen came to life and I had both screens active. Thinking that the condition was now corrected, I shut down and disconnected the external monitor. When I restarted, the LCB stayed black. I reconnected the external monitor it works fine. However, in my device list, the only monitor listed is the external monitor. The computer does not seem to detect the LCD. I checked the update list to see if display updates had occurred around the time of the problem but all I saw was an update of Lenovo Thinkpad Display 1366x768 that occurred about two weeks before this problem.
I might also mention that this occurred two days after my warranty expired.
Any suggestions gratefully received.
Solved!
Go to Solution.

Thanks for your suggestion. I have good news, I guess.
I started the computer to try your suggestion and to my surprise, the LCD was working again. I did the hard disk diagnostic anyway and it found nothing wrong.
Then, when Windows started the computer configured a Windows update (Security update for Windows Service Pack 1) and seems to be working normally.
I shut down and started up again and it all seems normal. So, it doesn`t look to me like a hardware fault.
In thinking back on what I did after I posted my original message, the only thing that comes to mind is that I uninstalled and reinstalled the Thinkpad Toobox. After the problem started and once I had access to the computer via the external monitor, I had been getting a message that Toolbox was unable to update so I reinstalled it.
I`m thinking that my problem is somehow related to the power management routines. I have experienced less severe freeze-ups occasionally after a hibernation/sleep mode occurrence. From reading some of the posts on this community it seems that there may be conflicts between Windows and Lenovo power management. Perhaps I may need to focus on that aspect. I must admit that I have ignored it until now. What do you think of that idea.
I will also investigate extending the warranty right away.
John Carey

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