What are the symptoms of a faulty onboard computer?

[MaddoxMarie]

The symptoms of a faulty onboard computer are as follows: 1. Instrument panel: The instrument panel displays incorrectly or appears dim. 2. Computer screen: The onboard computer screen goes black. 3. Ignition: The vehicle has power but the instrument panel does not display or the engine fails to start. 4. Doors won't open: The onboard computer is typically used to calculate instantaneous consumption, driving mileage, temperature, average speed, average consumption, or to set maintenance reminders and alert the driver to take breaks. The causes of a faulty onboard computer are as follows: 1. Components: In water-damaged vehicles, the computer board may corrode, leading to broken or shorted component pins or damaged components. 2. Burnout: During vehicle charging, if the charger voltage is set too high, the polarity is reversed, the key is turned on while charging, or the battery terminals are loose, the generator may directly power the computer board, causing it to burn out.