It is usually caused by an AMD display adapter driver. Once you delete that driver, it will probably be ok. Here are the complete
instructions from Lenovo:
1. At the black screen, press and hold the power button until the system powers off. This typically takes 5-8 seconds.
2. With the system still powered off, press and hold the Shift and F8 keys.
3. While still holding Shift and F8, press and release the Power button. Continue to hold Shift and F8.
4. The Lenovo logo should appear on the screen followed by Please Wait. Release Shift and F8 at this time.
5. The Recovery screen should appear. If only a blank screen appears and not the Recovery screen, retry steps 1-5.
6. From the Recovery screen, click on See advanced repair options.
7. Click on Troubleshoot.
8. Click on Advanced Options.
9. Click on Startup Settings.
10. Click on Restart.
11. The PC will now reboot to the Startup Settings screen.
12. Press 4 to Enable Safe Mode as prompted.
13. The PC will now boot to Safe Mode.
14. Enter your user name and password as prompted to log into Safe Mode.
15. Open the Start screen.
16. Type "devmgmt.msc" and press Enter to start Device Manager.
17. Double-click on Display Adapters to expand the Display Adapters category.
18. Right-click on the specific AMD Radeon HD device and choose Uninstall from the menu.
19. At the Confirm Device Uninstal prompt, check the box Delete the driver software for this device and then click on OK.
20, Restart the PC.
21. The PC will now boot to Windows normally.
22. Enter your user name and password as prompted to log into your PC.
23. Make sure your internet connection is working and then run Windows Update. Choose to install all available updates.
24. The PC should now be functioning normally.
