Vertical lines/bands on Sony Bravia KDL-46EX710
This 2.5 yr old LED 46" TV started one day to show white spots over the screen as if a poor aerial (on an old analogue TV). This progresses to narrow vertical bands of pixels flashing different colours on top of the normal picture. The bands are not solid but more like a long coloured flashing barcode This then then finally degrades to vertical bands of white flashing bar codes that cover 70% of the normal picture.
When the TV is cold i.e. overnight is off, it will start and operate perfectly for 15 mins then the white spots, coloured vertical and final white bands/barcodes occur over the next say 5 mins.
All other TV operations work perfectly, menus etc. Is this a LCD screen problem or a board replacement i.e. the TCON ?? board. The TV only has 3 computer type boards in the back with mainly plugin connectors and cables so swapping a board looks possible