After only having the LN52A750 Samsung LCD tv, it began to automatically turn off and then back on continually untill you unplugged the whole set. This continues to this day as soon as you plug the tv in. It began this on Feb 24, 2009. It is now April 5 and I have yet to get my refund (because the part is on backorder, and they apparently have NONE in inventory to replace???) they have been jerking me around, and twisting things around like they are ABSOLUTELY withing their 14-21 days of completion on the process because it was only APPROVED to BEGIN on March 24th, a WHOLE MONTH after it broke and I reported it as such. This has been the WORST costumer service I have EVER received and will never deal with the company again. I suggest you do the same.