If the image was fine before you changed the calibration and bad after you changed it, my guess is that it isn't the optimal calibration. Better reset it to what it was (I hope there is a reset) and make less/other/better changes.
To make a long story short my wife and I just purchased a LG LM557600 TV from the local BB to replace the one we had to return for the same problem I am about to mention. We got the TV home and I looked up David Katzemeier (forgive me for spelling) Calibration settings for this TV and started to input them into the Expert 1 setting. When finished the 3D, Picture, and Picture Wizard testing options on the TV were not working properly. The 3D test is a full screen of mashed black and white pixels, the picture test of the football team I can only see the bottom half of the picture, and the Picture Wizard is a mash of colored pixels. I called LG and the guy I talked to did not know what to tell me so he gave me the # of the local authorized LG retailer and repair. The guy came over and said he had never seen this before either and he was going to have to do some research. Like I said before this is the second lm7600 to do this. Can anyone help? Anything would be greatly appreciated. Thanks!!