Is there any clicking as it warms up?
I have a Samsung LN40A530P1F built in Jan of 2009. Lately when I turn the tv on, it takes several minutes, (5 to 10) before a picture appears on the screen or for any sound to come on. It does this with or without switching it to tv air, cable, satellite. So, I know it's the tv. What is the fix? Unplug it for an hour? Change electrical outlet location? Go back to factory settings? Or, is there some kind of backdoor code to clear it up? Thanks for any help. Of course, the tv is never moved or touched, so it wasn't dropped, hit or damaged in anyway.
You can try many of those options. Here's the reset guide: http://www.samsung.com/us/support/supportOwnersHowToGuidePopup.do?howto_guide_seq=5306&prd_ia_cd=N0000043&map_seq=44729
But if that doesn't work, then you'll probably need to get a service technician to look at it; here's the thread, where you can get details on setting that up: http://forums.cnet.com/7723-13973_102-542437/service-issues-click-here-for-help/