Hi, my Nexus 5 is rooted and was on cyanogenmod. That worked for over 2 months now.
But today it suddely shut down and started rebooting. I was able to rebbot it after 10 bootloops. Then it shutdown again half an hour later.
Now it is crashing at the bootloder "Google" logo and starts then rebooting. Sometimes it goes to the bootanimation.