Dreambox 500-c looks completely dead

Hi everyone.

ok heres the scenario. I ftp'd into my box last night. connected fine and put new image into the tmp folder. The changed the name to root.cramfs and on the box menu and uploaded. Problem happened now that the box froze. Now i have the following problems

1. Only green light shows
2. Won't produce an image when linked to TV
3. Have tried to leave unplugged all night still shows green light when plugged back in
4. Red light does not appear
5. Cannot connect to FTP anymore

If anyone can help me i'd really appreciate it.
Thanks

Sandy