It's LCD dude, just LED backlit.
Well I had a look at mine, as I said I'm using D-sub connection. I can't access those Display Mode settings either no matter what I fiddle around with

Never had to before, my aspect has always been correct with no stretching or anything.
Only thing I ever did was switch to ECO in Picture Mode iirc
I can look into hooking it up directly to my laptop at some point via HDMI but I can't do that right now...I'm messing around with PS3 disc dumps on the desktop atm.