How do I turn on my tablet?
When you're in download mode(bootloader), go to your pc and download a firmware from here: sammobile.com/firmwares/database/SM-T110 

Follow the instructions on the site:

Extract (unzip) the firmware file
Download Odin v3.10.7
Extract Odin ZIP file
Open Odin v3.10.7
Reboot Phone in Download Mode (press and hold Home + Power + Volume Down buttons)
Connect phone and wait until you get a blue sign in Odin
Add the firmware file to AP / PDA
Make sure re-partition is NOT ticked
Click the start button, sit back and wait few minutes