LN-R408D Samsung LCD flat screen TV

Unplug the TV from AC mains wall socket, and re-plug it back after 30 minutes or so. This must make a hard reset to this set.

The part labeled cp with a p on it has a black burn mark in the middle of it on mine!

I'm willing to bet you have a backlight problem. Turn on the TV, take bright flashlight and shine it on the screen. Do you see the faint image???

It could be the power chord thats gone bad. I have the same television. Mine is broken as well. Would you be willing to part wit it?

I have a samsung ln-r408d that has a cracked screen, contact me at [email protected] my name is kevin...

You either have a bad Power Supply or a bad Main bd. Worst case can be the inverters on the Panel have gone bad in which case the Panel needs to be replaced.

u need a main signal board replacement

If you have sound on the stations this is a problem in the display. Take bright flashlight and hold it against the screen. Look for an image around the edge of the flashlight. If you see an image then it's one of three problems;
1) The inverter board is bad.
2) The CCFT (cold cathode fluoresent light) are bad.
3) The power supply to the inverter board is bad.
Someone knowledgeable in electronics can replace the bad part(s).

Try unhooking the LVDS cable from the controller board and see if it does the same thing. If so you need to replace the LCD panel.

Sounds like a backlight going bad or possibly the inverter. Check each backlight first for dark discoloration on the ends. If that checks out good then it's the inverter.