I have exactly the same problem!
Followed various instructions for getting root on 4.3. I do not know where did I made mistakes, but the process was not successful. Rooted ROM gave black screen. Then I flashed the default 4.3 and screen turned white like this.
After that I managed to update to AOKP nightly, wiped everything, but screen stayed the same.
I think the problem happens during fastboot mode (when blue LED is lit). Copying various kernels I can make my screen black or return to white like this, but not normal.