Unhappy [Q] Rebooting every time after about 30 seconds of use

I've got a Galaxy Tab 10.1 wifi and installed cyanogen mod on it. It worked fine for quite a while but now it's rebooting after using it for about 30 seconds. I've tried reinstalling the cyanogen mod version I was using and also installing other version but keep seeing the same behavior. Any ideas what I can do? Can I check certain log files to see what is causing the reboot?