blinking LED on logic board? Samsung HPR5012X/XAA

[jem16]

i have a 50" samsung HPR5012X/XAA. when i got this TV it had no picture but had sound, so i replaced the Y-sus the X-main and the buffer boards. i now have a picture but it has horizontal lines through it (see picture below)

Also, I don't have the service manual for this TV and would like to know what this blinking light on the logic board means, is that normal or is it trying to tell me something?? the blinking light is labeled LED2005

any help would be appreciated, thanks