Respuesta a "Home Button, Charging Port, Speaker, and Headphone Jack Unresponsive"There is more internal problem with your device. The phone should work fine without the pentalobe screws.
Respuesta a "Why my Samsung Galaxy Tab S 8.4 keeps on restarting?"The solder joints of the battery connector on the motherboard is weak. If you see it under a microscope, you will see some cold cracked solder joints. You need to re-solder them and you should be fine after that. I did some galaxy tab with the same problem.