Lot of problems - Revert back to original 1st generation

Hi, this is not the corret forum, but I hope you can help me.

I am a paying customer of firecore, I’ve got a 1st gen appletv and installet atvflash some years ago. A year ago I wanted to try out Crystalbuntu and formatted my appletv to use it. Since i’ve got some problems with the airplay, I want to revert back to the original apple os and then re-install atvflash.

I can’t. all I got is a blinking question mark on the tv. I tried to install Openelec, and I was successful, but the restore procedure of it didn’t resolve the problem too.

It seems that the partitions of the internal disks are corrupted. I need a full image of another appletv, but I don’t have access to one.

Can you please help me ?