Shutting down on startup

[Nachteule]

(11th Dec, 2016 09:33 AM)Oli Howson Wrote:  now's the problem. Tried a third add-on, it froze and wouldn't exit back out of it. I had to do a hard shut down (by which I mean I had to pull the power). Now the Pi turns on, boots into xbian, and then goes 'bloop' and turns off before I can do anything...

Impossible to say what's going wrong.

Do you mean system shuts down or just power off system?

Maybe you have a power supply issue