Samsung 6400 3d 55 settings - Samsung 6400 Series UN55F6400AF 55" LED Smart TV 1920x1080, 120 Hz, HDTV, 3D

The screen being green on your TV is either caused by a loose or damaged cable connection of a media component to or from the TV or it could be that the TV's T con board is having problems and it would be more cheaper to bu a new TV than to try and fix the one that you have is broken.

Was the set dead before you replaced the power board?

go into settings and check audio if set on TV sound or Audio system also there can be issues with HD channels and regulars channels I hope this helps

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Samsung is not good with the support for those sets. Have you tried the factory reset? Please post the whole model number and also tell us what lights are on if any

Unplug your tv for a few minutes might help if it doesn't, turn your tv on, go to menu, reset to factory settings.

I have the same issue. I read and watched online tutorials about the compositors but after opening the set up I was unable to find any that had gone bad. I was able to upgrade the software by using a USB thumb drive but the issues are still there. I'm thinking of swapping out the motherboard and/or the power board next to see what the fix is.

Can't predict, what might have been happened during a lightning. Your set need a through checkup. Contact any experienced service technician.

If you are not familiar with electronics, do not attempt to repair. Whether you suffer fatal electrical shock! Instead, contact the nearest service center.

These are not meant to be repaired, just boards replaced.

Follow if you are able the AC voltage into the set and then when it changes to DC follow that---confirm all voltages are present, a total dead set usually means something open not too far from the power cord.

its the convergence problem in your power supply board

please check out this links

for convergence board ics reparing it your self

http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

and for convergence settings

http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

thanks.