Samsung Galaxy Tab E repair question

I have a Samsung Galaxy Tab E from AT&T (yes I know AT&T, forgive me) to use in conjunction with my Samsung Galaxy S7 active. I've had it for four weeks and have sent it to Samsung two times for repair. I've called AT&T twelve times and Samsung three times. After about thirty to sixty minutes the tablet over heats and locks up. (hot spot on the back just above the AT&T logo) The first time Samsung sent me a new charger and cable. As you can guess, this solved nothing. I returned it to Samsung. this time the repair tracking notice shows this:
FCL replaced PBA
update software added USB cable
When I googled PBA I got this forum and Philippine Basketball Association.
I have two questions:
1* What is the PBA?
2* Does anyone know what is located inside just above the AT&T logo that could be getting hot enough to lock up the device?

Thanks

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