how to turn on the samsung galaxy tab 3 if you abandoned it for months or years

[noureskan3]

How to turn on the Samsung galaxy tab3 if you abandoned it for months or years ? I tried every thing I pressed the buttons ( power , volume up and down...) and opened the back of the tablet and disconnect the battery of the tablet , still it wont turn on . what should I do to turn it back on ? the tablet is perfectly clean no damages (Samsung galaxy tab 3)

 

[webworkings]

You may need to replace the battery. They don't usually keep going after that long of a time period.