Thank you for posting your question on Just Answer! I will be happy to help you with this problem. Can you please give us some more information so I can better answer your questions.
-What is the light on the front doing?
-Is the clicking noise coming from the back or the speakers?
-How old is the unit?
When it was on, was the picture 100% perfect?
There are a couple things we have seen cause this. We see a lot of the times a few capacitors in the power supply fail and cause it to shut down. However we have also see the logic board and main board cause this. Do you know how to use a meter? If so I can help you troubleshoot/repair this. If not, you will need a engineer at this point, the bad news is repair generally runs around $300-400.