I need help with my hitachi lcd tv model 32LD6600 B?

I have a Hitachi lcd tv model 32LD6600 B. I got it from a friend who said that when he turns it on the red led flashes once but the tv does not go on. Last week I turned it on with only the aerial plugged in and it worked fine. This weekend I plugged in the dvd player and freeview box that worked fine with my old crt tv and a similar problem arose. The red led comes on, the green led comes on for about two seconds and then nothing happened. I have since disconnected the dvd player and the freeview box but the same thing happens. Can you help? I have a fairly good knowledge of electronics so I'll understand any technical descriptions that you may give. If not I'll get back to you.