I have some questions for you:
1) Have you ever crashed your Phantom?
2) Was your Phantom in working order before you tried updating the firmware?
3) How did you attempt to update your firmware?
4) Where exactly did it fail at 50%?
5) Which strobe light are you referring to?
6) Is your Phantom beeping or is your remote controller beeping?
7) What happens if you just power on your Phantom?
8) Do you see any error messages on the TXT file in the root of your memory card?
ok i just finished updating with the beeping still going on till it hit 78% of update
the beeping stopped and everything is back to normal
phew