I have my Samsung LN-40A530 LCDTV hooked up to one peripheral, a Samsung upscaling DVD player. I just bought both a couple days ago at Best Buy. The TV periodically goes blank or blue and I get the message "Searching for Signals" before it returns to the picture. I have unplugged the TV and replugged it several times, but I still have the same problem. Thanks for your help.
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Yes, you would need a dvd player or some sort of additional media player. They have alot of different kinds out now. You can even use your cable box to order movies, or you can even use a device that will stream movies instantly such as netflix.
It sounds like you have a Power Supply Board problem. The PSB is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.
I had a problem with a Samsung 46 inch LCD and it had audio and dim light but no picture and found out that the logic board toward the top (inside tv) was bad and was no longer available and the only way to fix it was to get the entire display panel (the logic board came with it) It was not costwise to repair. Hope this helps.