HELP!!Xbox flashing red

[baicha]

here's my problem i ftp the xbox sdk recovery disk to the xbox hard drive so i can convert it back to retail, it started to format the hard drive then gave me an error( cant format hard drive). So i restarted the xbox, but now all it does if flash red, i put in original dvd game nothing still happens only black screen and the flashing red ,does any1 knoe wuts wrong with it, please help me out???