Power supply? I have had this tv for 26 months. The power in the area went down to a very low

Question

I have had this tv for 26 months. The power in the area went down to a very low situation and fluctuated for a few seconds before going back to normal. Power never went completely off. Anyway the tv didn't know whether to be on or not and before I could unplug it the power returned to normal. I turned the set on and the volume was at its highest level. I turned the volume down and noticed the picture was without as much color as usual. I tried to access the menu and nothing happened. Then the set turned itself off. Then it turned itself back on. then about ten seconds later it turned off etc,etc,. Any ideas?