My Sony has been experiencing blue arcing horizontal lines for about a year. The picture was more blue than it should be. Now the screen goes totally blue after about 5 minutes. I have been told it will cost about $800 to fix. I am wondering if I should get it fixed or trash it. It is 6 years old and cost me $1700 new.
You have a bad picture tube, or perhaps a picture tube drive problem.. To see what is bad, remove the front speaker grill under the screen in the front. Remove the screws that hold on the board that covers the front. Insidfe this set, WITH THE TV SET UNPLUGGED< Locate which one of the tubes is the blue one. Gently pull off the board from the end of the picture tube and swap it with the green tube right next to it. The green tube is always the middle tube. If the blue comes up again, then the blue tube is bad and you will most likely be better off to buy a new TV set. If the green comes up as the bright one, swap back the boards, call a tech and tell them there is a CRT driver board , or an RGB drive problem. This should not cost you an arm and a leg to get repaired. Good Luck, and let us know how you make out with the repair of this TV set.
Thank you Larry for the info. Do I need to swap the wiring on the boards, or the board with the wires still connected? Some of the wires going to the green board are not long enough to reach the blue tube.