Hello.
The number of red blinks gives you the error code and your issue. I strongly suggest you bring it in to a technician if you don't:
1) Know how to use a voltmeter / ohmmeter.
2) Are not willing to swap out boards yourself.
3) Have at least 100USD to spend.
Did you have any signs beforehand? Did the screen go dark at times? Or did it happen all of a sudden?