Samsung tv's lcd picture is fuzzy and red - Samsung LN37A450 LCD TV

Hello. Before you start replacing parts, make sure your connections are correct. It sounds like you have connected a composite source to a component input. Composite is three RCA plugs, a yellow for all of the video, and a red and white for audio left and right channels. Component is five RCA cables, green, red and blue for video, and red and white for audio. if composite is connected to a component input, the picture will be black and white with squiggly lines all through it.

check the cable line on the back of you tv

The problem might be in the T-Con controller - try this solution: http://www.coppelltvrepair.com/p/539/repair-service-for-auo-t400hw01-v4-40to2-c02-40t02-c02-lcd-timing-controller-t-con-causing-bad-tv-picture

More than likely your set is fine and you need to provide it with a HD signal. Contact your cable or satellite provider for an upgrade

well this could be a power supply issue try this web site they could have the part www.discount-merchant.com
Ness

this problem occurs usually in the power supply change or check the power supply borad

Before thinking of TV problem, you should play a DVD first and see how it goes. TV problem only happens when all sources were affected. If you have the same problem for all sources, open the cover, disconnect LVDS cable and re-connect it; then try to tap or shake gently the LVDS cable and see if the picture changes. If yes, replace LVDS cable. If not, then measure the power on supplies from main board to power supply board, see this 5 VDC is stable or not. If it works fine, the problem may come from T-con board or some case from defective panel.

Call 1-800-Samsung to set up a warranty service call. They will repair it in your home if they send a Samsung Field Engineer. You probably have a bad Main bd.

Is it a projection? DLP? LCD? etc... depending on the type the suspicion i have is it is out of focus.  The symptom of writing triplicate comes from the thing being out of wack.. a tech needs to fix it.  all this is assuming ;you have a projection tv of some sort.

Sorry, I haven't been on here for a while.
I haven't found the cause. I find that leaving it switched on overnight cures it.