This is quite common issue for tablets with android to stuck on start up screen.
There is no need to send it for repair all you need to do is update the firmware (re-set).
You need to have memory card at least 2GB. Please format it before use.
1.From you PC download this file and unpack it(winrar or winzip)
You will get Firmware Install (catalog) and file wmt_scriptcmd (file)
2.Please move those files to your formatted memory card ,don't put them to any folder.All you should have on memory card is Firmware Install and file wmt_scriptcmd
3.Turn off the tablet , put the card it and turn on again.Tablet will update , please wait till you see message then upgrade is complete.
4.Take the card out.All done. Tablet will restart.
Please note that all data will be wiped.
To re-set the tablet please also try.
1.Press and hold volume button up and press and hold power button , release buttons
2.Press power button for about 3 seconds.
This will re-set your tablet.