Chosen Solution
HI . I have a Samsung Galaxy Tab 3 7.0 and it wont turn on or charge . I tried to do everything that some people did but nothing worked on my tablet . I tried to put off the connector of battery but it didnt work . i tried almost everything . Can you please help me ?!
Needs a new charge port. If the port is soldered onto the board, i suggest getting a new tablet, however, most of the tablets use a flex with a charge port on it, try finding this flex/daughter board, but be careful, and make sure you bought the correct revision. If you could post pictures of your tablets motherboard (with just the back cover off) then i can tell you if the charge port is something that is soldered or is on a flex/daughter board.
I had one doing this same thing. I replaced the charging port but when I plugged it in I got nothing. The soldering looked fine under the microscope so I knew it had to be the battery or the board. I did the battery connector reset several times until I got the screen to flash the back light. Leaving it plugged into the original higher amp charger it would keep flashing the back light on and off. Until it got enough power to boot the LCD. Then finally enough charge to keep the screen on. Its a bad design on Samsungs part. The board doesnt allow the battery to charge enough before the battery can support the screen voltage draw. I think when the battery drains too much it can get to a point the board wont even charge due to this draw.
