Sometime using Dreambox the boot can be damaged, you can do anything else than repair the boot rewriting it.
So we make this very easy.
Repairing Dream Box Boot
1) Connect your addon as you see in the image below
Dream Box 7000 S

Dream Box 5620

2) Go on Dream Box options on Cas Studio
3) power on the dream Box
4) Press Connect
5) If all works ok you will see new buttons:
Open file = choose the file you need to write as a boot (click here for DB7000S or here for 5620)
Write = put the the file inside your DreamBox
6) it needs about 15 minutes to do the work, meantime the countdown starts.
Enjoy your DreamBox