Have you checked the power source? If not, cross-check the power source and cable of firestick. Use wall adapter, not the tv’s USB to power the firestick. If firestick remote is not working, try using a [https://www.thetechtoys.com/firestick-remote-not-working-replacement-remote-app/|firestick remote app] which also works as the best alternative to the physical remote of firestick.