Why won't my Samsung Galaxy Lite boot past the T-Mobile screen?

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AC Question

Samsung galaxy lite won't boot past T-mobile screen

I did a factory reset a couple of days ago, seemed to be working fine. Now won't boot, will boot into recovery mode. Won't turn off, after putting the battery back in immediately tries to boot again.

Tried another factory reset, still does the same thing. Tried clearing the cache partition, get an error message and then boots to the T-mobile screen again.