plasma tv power problems?

I have purchased Hitachi plasma P50X01A and after one month it stopped working. When I power it on it double clicks and that is it. Red light comes on but the green light never comes on. It doesn’t do anything if I press the TV power button. Only if I unplug it from power source it does the double click. I had 2 tv technicians look at it and they both have extensively tested the TV and said the power supply is faulty. The problem is that we already got 2 new power supply units and the TV still does the same thing - double click, red light and nothing. So either both technicians were wrong or both brand new power supplies are faulty. Any ideas?