If you have good camera, take some images of the TV area where you found dead pixels with low shutter time + some zoom, take as clearly as you should be able to magnify to the extent till you can identify sub-pixels of each pixel
There are two cases
1. Complete pixel dead
2. Only sub-pixel dead (sub pixels colors will be RGB)
If dead pixel is confirmed on the image, then
Gently rub that area with soft cloth and see if that gets corrected, if not, RMA is recommended