Hi. Holding the power button for up to 10 seconds? It may be necessary to open up the tablet to manually brake circuit from the battery. Proper reset steps are http://www.satechhelp.co.za/5448/Reset-Telefunken-Telc-73giq-Tablet-Forgot-Pattern-Password
Let us know.
Signature: I (as a co-founder of this site) have offered online support since 2014 but have now (as of Oct 2016) given up my shareholding and am now with http://www.saroms.co.za