Mt samsung galaxy tab pro.10.1 won't turn on charging port has been changed what could it be....help

hi michael.
see if this link helps you out.
Galaxy tab 2 10 1 screen frozen won turn off on black screen Google Search

battery has worn out... get it replaced

Linda, if it is the charge port, mini USB, yes they can be fixed or replaced by cell phone/computer repair shop.
Check the attached links videos showing port replacement. Good luck.
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Android tablet charging port fix
Toshiba Tablet AT300SE AT305SE Charging Port Repair
Samsung Galaxy Tablet 10 1 Tab 3 10 1 P5200 P5210 Micro USB Port Replace HD

Rooting a device always has the potential to turn the device into a 'brick' in some circumstances. Most good rooting procedures mention this, as well as steps to make a backup of the current system and how to recover from a failure to boot after rooting. There are also different 'mods' that can be tried to see if one of them will work in place of the one you first chose for rooting. These are all dependent on exactly how Android was modified for your hardware. Google 'rooting' and 'Samsung Galaxy Tab 101 Tablet GTP7510MAyXAR' and see what the articles say. You can also try a hard reset of your tablet and see if that does anything. Example at this link http://forums.androidcentral.com/samsung-galaxy-tab-pro-10-1-rooting-roms-hacks/396031-how-root-your-galaxy-tab-pro-10-1-a.html

try resetting the tab and if problem still occurs. return it.

then you should hold the power button in for 10 seconds and then let the power button go

Change the battery and try to turn on

you had to plug it in the charger for a while and then you hel the power button for more than a minute

if it not work hold power button and volume up for 20 sec.

Hold the up and down button and Power on for10 seconds and that should cause the Galaxy 3 to reset. Work for me.