Sounds like corrupted firmware. A firmware update might be necessary. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Hi Kotti Sunil,
No one will come again. It is India. If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
The TCON board or the LCD panel is faulty. Can confirm by replacing the TCON board.
If you wish to get some details; visit the site linked here. Pull up older posts. http://electro-medical.blogspot.com/