Television and Home Theater

Hi,

I have Samsung HCM553W RP 55"TV. It was running fine until last nght, suddendley blue band shows  up horizontal direction, specially is more visisible at dark back ground color. 

Do I need to replace convergence IC board?

Anyone can help?

I was reading most of the Mitsubishi TV sets with Green Light Blinking, and they refer to having issues with the DM Module.

My question goes to Larry Dillon, Does the ws-55813 could have the same problem I been reading about on the other posts? Is the repair manual with wiring schematics for this unit available?

Model # PT-56WX53G

 Well...we think that ever since son-in-law had his computer hooked up to this television, settings have been changed that can't be fixed with the regular television menu.  (At least we think that is what changed the settings on the television.)