Sponsored Links: What to do if your Tecno phone is dead I will just go straight to the point without taking much time. Check the battery if it is still good. Use your tongue to touch the terminals. If it shocks a little, then it is still good. If no, change it. Clean the battery terminals if you detect that it shocks but phone still not power on. Replace the battery change your charger and USB cable. For good reason, this may be the reason why the phone does not power on.