Yoga Pro 2 - Display not recognized in windows (Driver or Hardware issue?)

Out of warranty by a month!
Yoga Pro 2 - 256gb, installed new wireless card a month ago. Windows 8.1
The touchscreen still works while the screen is black.
System restarted after sleep mode I think.
The Lenovo logo is displayed, seems to load windows, but when windows loads (I don't see it load so this is an assumption) the screen blanks and the black light is on.
I can connect an external monintor which will connect after a return from sleep mode(odd). Which then turns the backlight off.
When on the external monitor the internal display is not even recognized by windows.
When I boot in safe mode, the internal screen works fine with of course limited capability.
I have reloaded display drivers from the support site.
Right now my internal monitor is not recognized by windows and is dark, and I can use an external monitor.
Anyone have any clues as to what my be going on? Hardware, driver etc???
What information can I provide?
Solved!
Go to Solution.

This is a pretty weird issue with conflicting observations.
1) Screen works in Safe Mode but not in regular boot. (So, not hardware issue)
2) Display works on external monitor in regular mode. (So, not drivers issue)
Did you install the wireless card yourself? Did you unplug the display cable while installing the card?
Could you re-open and check that all connections are good?
Is the Wi-Fi card working well?
I would also recommend a complete reset of the laptop to eliminate the possibility that this is a corrupt driver. You can use the NOVO button to reset your laptop. Make sure to make a backup on external drive for your personal files.
Current System - Lenovo Y510P, GT755M SLI, 8GB RAM, 1TB HDD + 24GB SSD
When your plans fail, your Real Story begins!!

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