The actual history of the industry would indicate that price fixing is common: the LCD[1], RAM[2], optical drives[3][4], GPU[5] and CPU[6] markets have all faced massive scandals involving price fixing or other anti competitive collusion, often resulting in huge fines.
[1] http://www.bloomberg.com/apps/news?pid=newsarchive&sid=aP1P0...
[2] http://en.wikipedia.org/wiki/DRAM_price_fixing
[3] http://www.computerworld.com/s/article/9243591/HP_sues_seven...
[4] http://www.pcworld.com/article/240937/hitachilg_data_storage...
[5] http://www.engadget.com/2008/09/28/nvidia-details-settlement...
[6] http://www.nytimes.com/2009/05/14/business/global/14compete....
Price fixing in electronics seems entirely possible, and I don't doubt that it happens. But if it was happening in the world of TVs, surely TVs would cost more than they do now.
How do you figure? TVs are cheaper and bigger than ever - they're practically giving them away.
My understanding was that producers are pumping gimmicks like 3d and huge curved screens because there are absolutely no margins left in the commodity TV/monitor market.