Arduino UNO does not get recognized by PC(no USB connecting sound), also TX and RX not blinking, neither are lit
You should definitely avoid connecting anything else than 5v to these 5v(!) PINs. The Uno has regulators, but these only work when powered through the power-dc-connector (or USB). You can easily buy a 9v-block to dc-jack cable to connect power to the right point easily.