I recently got my own Raspberry Pi (2 B V1.1) I have got an 8 GB micro SD for it. I used the standard procedure to put Wheezy on it. It shows the splash screen, and the console-output for about 3 seconds. The last thing I can see is:
[2.702751] Freeing unused kernel memory: 384K (80754000 - 807b4000)
then it all restarts.
I also tried NOOBS. It just shows the splash screen for a second. Then a just blue screen for two seconds. (repeat)
What is broken?