Evo update gone wrong?

Hi

I wonder if anyone can help i have a EVO E3HD and every month i update it automatically through the box? However i did this the other day as i normally do and now it wont boot up it just stays on the splash screen (OPEN ATV)

Thanks for reading....

Quote from pheonix

reflash the image, or use your backup to return to a previously known working setup ( if you made a backup that is ).

Hi

Thanks for the reply can you point me in the right direction in how to re-flash when the box wont boot up....

Thanks again