What would cause no power to the coil?

No power to the coil could be caused by several factors, including a blown fuse or tripped circuit breaker in the electrical system, faulty wiring or connections that disrupt the circuit, or a malfunctioning ignition switch. Additionally, if the coil itself is damaged or shorted out, it may not receive power. Lastly, issues with the power source, such as a dead battery or insufficient voltage, can also lead to no power reaching the coil.