Can someone -please help? ..and speak very elementary please. My samsung LN-T4665F has a blue vertical line running from top to bottom. can you tell me what caused this and how can i fix it? i cant afford another 300.oo bill. my tv is only 2 yrs old. a year ago there were colored dots all over the picture. i watched the repair man and it looked so easy to fix. he replaced a bulb and charged me a lot of money. can you tell me what i need to do to fix this problem??? thank you!