Clicking Brick Syndrome after using Raspberry Pi
I successfully did a CPR on the NXT CPU, which was 'bricked' by the 'clicking brick syndrome' after updating the firmware of the NXT 2.0 to 1.31

The USB connection was lost and the PC (Win7 64bit) installed an incorrect driver for the NXT USB connection. If found the solution here:
 https://www.reddit.com/r/FTC/comments/1vvwq9/for_those_who_have_or_have_had_a_clicking_nxt/

After I installed the correct NXT drivers and when I connected the (clicking) NXT I had no connection to the internet and it was recognized as NXT again. I could install the (latest) firmware via the original NXT software. After that I can use the EV3 software as well with my NXT (USB only, no bluetooth)

Hope this helps!