Asus n56vz laptop wont display full screen on external monitor after restart

rollinD

Honorable
Aug 10, 2012
9
0
10,510
I took out the screen for my laptop and hooked up this monitor.
http://www.bestbuy.com/site/aoc-21-5-ips-led-hd-monitor-black/8163044.p?id=1218864514315&skuId=8163044
When i installed it, it worked full 1080 and was ok.
Then i restarted and it displayed 1/2 screens in the display options all of sudden and wont display any other option other then 1020/768. Both the laptop and monitor are 1080 and worked fine when i plugged it in.
The laptop no longer has a screen since it broke i also unplugged the inverter cable. It worked fine until a restart.

How do i get back to the way it was when i first plugged it in?

Only thing i did was run cc cleaner Before restart it cleaned the registry...