This seems to be a common theme here with the Samsung sets. Like vazaraq, my set which is just out of warranty has a stroboscopic flickering of the screen. My picture is an exact copy of his video. I have a 46C610N. I have had 5 chat sessions with the help crew. Ticket numbers include LTK564072341X and LTK564075020X. After going thru all the trouble shooting steps, my agent David sent me a link to ask for a service call. I fill out that form and send it and a small window pops up that says "Data processing, please wait". The first time this happened I let the computer process all night!! I am starting to get slightly frustrated with Samsung. This is my 6th Samsung monitor/TV and the first I have had problems with. I love the picture of this set and highly recommend Samsung sets to my friends and family. I may have to rethink that recco. I would appreciate any help.