Problems with Scarlet 52

[Buffalo MX]

I have the following problem with HDMI1, Component 1 and cable inputs

without specific situation I lost video on screen, audio still available, if I turn off and on tv video returns, once this happened to me twice in less than 10 minutes on component 1, wife have since this about 3 o 4 times while watching cable or SD DVD.

I called Sears Mexico with this situation, also I pay for the advance warranty and they replaced the TV for a new one (took 2 wks)

new set is worst lots of banding in screen & lots of white sparks on blu ray home screen, fixed switched to HDMI input 4

when connected blu ray player (panny, hdmi input 1) and try to watch a disc, player got several errors about disc incompatibility I tried with other disc same problem, I turned off real cinema and true motion and disc played well, suddenly TV restarted off/on by itself while disc playing, audio at HT keep heard.

next day while watching sleeping beauty tv restarted off/on 3 times and with special features disc I had a half screen with gray image and then tv restarted once again

I have present again my complains to Sears and LG representative and a solution is being prepared, hope so.

any thoughts and or recommendations?