To help different users to solve their problems by shareing my experience
Sanjay Pal posted an answer for this Sony Bravia KDL-46EX521 Internet TV Compatible Full Motion Articulating Swivel Wall Mount Bracket This Full Motion Mount Will Extend 26 Inches & Easy to Install TOP SELLER:
"Panel needs to be replace. No other solution"
Sanjay Pal posted an answer for this Sony WEGA KE-42TS2 42 in. HD-Ready Plasma Television:
"Seems some thing wrong with power input plug or may be with power board in side the tv...."