Did you get this fixed? From what I have found, the power supply rarely fails on Hitachi sets.
If it's not the power supply I do not know what else it could be. When I plug the TV into the wall the LED turns red and the TV screen is black with no sound.Does the clicking sound happen a 1-2 seconds after you power the TV on? If so may have a power supply failure beyond the usual (2 cap) suspects. This will require you to repair or replace the power supply unit. If you had to pick one of the two then replacing the PSU is the way to go unless you are really good at component level repairs.
Even though Hitachi is out of the TV making business, finding a new PSU unit should be hard if you know where to look.
This is the part where you have to weight your time vs your money in deciding if you want to repair the old tv or getting a newer model (with a square trade warranty for sure). The repair can cost a pretty penny if you send it in for repairs or it can drive you mad if you try to diagnose it yourself. All the while you're with a Telly and the Mrs. is getting impatient.![]()