Why does the dashboard not light up and the car fail to start with one-key start?

[OWalter]

If the dashboard does not light up and the car fails to start with one-key start, it is highly likely that the dashboard is malfunctioning, with a common cause being damage to the dashboard CPU. At this point, press the horn; if the horn sounds loud, it indicates the battery is functioning properly, whereas if the horn does not sound, it suggests the battery is dead. Below are the advantages of one-key start: 1. No need for the original car key or remote to open the door: Simply approach within 2 meters of the car, and the door will automatically open. No need for the original car key or remote to lock the door; just move beyond 3 meters from the car, and the door will automatically lock. 2. No need to use the original car key to start: After entering the car, there is no need to use the original car key to start the engine; simply press the button to ignite and start. The system comes with a built-in start protection feature, not only making starting convenient but also providing a self-check protection function for the original starting system, ensuring the car does not start improperly and thus prolonging the vehicle's lifespan.