Not sure why you cannot reply, so I will assume the Timer LED is blinking rapidly green.
This symptom means the Main board in the tv has to be replaced. The part number is ***** If you want to DIY then you can get the board on eBay for $125. If you get stuck during the repair, just reply back here and I can help you at no additional cost:
If you cannot DIY, expect to pay more than $450 total for a local repair shop. Just an in home diagnosis is usually at least $100 up front.
This tv will likely have more repairs to come, like the lamp, the color wheel, the fans, the dmd board... So you may want to consider very carefully whether or not to have it fixed or just to buy a new tv.
I'm sorry for the bad news. I do understand that finding out your tv needs expensive repairs is not pleasant but at least now you can make the most of your situation without high repair costs and long wait times. You saved a lot of time and money by coming here first.
Unless there is something else you can think of, please take a moment to submit at least a 3 star rating at the top of this page before you go.