What are the reasons for a car not starting with no power at all inside?

[Esther]

There are several reasons why a car may not start with no power at all inside: 1. Dead battery: This could be due to a drained battery from leaving headlights on for a long time or the battery reaching the end of its lifespan. It is generally recommended to replace the battery every 2 years. Additionally, installing xenon headlights, high-power audio systems, or DVD players can also cause vehicle circuit failures. 2. Incorrect gear position: For automatic transmission cars, the gear must be in P or N position when starting. If it is in R or D position, the car will not start. Some manual transmission cars may also not start if the clutch is not depressed. 3. Lack of antifreeze: Using water or low-quality antifreeze in the car can cause the engine to freeze and crack in extremely cold winter conditions, leading to the water pump failing to operate, the car not starting, and damage to other engine components.