[Q] Probably bricked, but can I do something about it?

I have flashed Samsung's test firmware some time ago. Posted a thread about going back to stock and got advised how to do it:

http://www.android.gs/root-and-flash...ream-sandwich/

Tried to do it and Odin showed flashing done in like 15 seconds. Now my phone shows GT-N7000 and a yellow triangle and after that nothing, only black screen. Can I do anything by myself or should I send it to repair? If I can do something, please be patient with me, since I am a newbie (that shouldn't even try this at first place, I know...)