Troubles with my young Sinotech smart LED tv.

<p>I recently bought a sinotech 49 inch smart LED tv 5 months back,everything was fine until just recently.</p> <p> </p> <p>The TV wont play,when I switch it on it just reads "please wait" the whole time.I've tried changing the power cable and switching it off on the main plug for 30 minutes but that did'nt work.</p> <p> </p> <p>Is there anything else I need to do?or should I rather take it back where I bough it?</p> <p> </p> <p>Thanks</p> <p>Mpilo</p>