This is less than ideal...
I seem to have bunged my T310 similar to the OP: I rooted my tab and flashed TWRP, flashed the kernel in question, then froze some of the bloatware using Titanium. For a stretch it was working fine, then I noticed wifi wasn't working—I attributed this to an install of Adblock Plus I assumed I hadn't set up completely—then I discovered I was getting only a blank screen on waking the device (I've got Samsung's magnetic cover on it), and that the battery was draining to the point of the tab turning itself off once a day, even from a full charge. I flashed the stock firmware named above, but continue to have issues.
I'm now back to stock recovery, and can access that and download mode like normal (in download mode, my status up top reads Product Name: SM-T310_NA; Current Binary is Samsung Official; and System Status is still Custom). On my first boot after re-flashing, I can hear the startup tone but can only see a blank screen (the startup tone sometimes stutters), but then I can only boot up to a blank screen or a boot loop.
There are a couple of points where the goof could have occurred, so I'm not sure where to go next. Any advice would be much appreciated; please let me know if I've neglected any information that might round out the picture.
Also, perhaps this thread belongs under Q&A, Help and Troubleshooting?