@Jayaygee, if you're getting a "No signal" message and blank screen on your TV then the stick or its power supply may have died. The stick has a light on it that comes on when you connect the power. If there's no light try another USB power adapter like the charger for a phone or tablet. If the stick is less than a year old it should still be under warranty.
Step by step instructions for returns and warranty replacements | Official Roku Support
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