1. The product is abnormal shutdown. ( suddenly power lost or long press power button to turn it off ). Lead to the result that system boot file is damaged. Generally this phenomenon happens on hard disk is higher.
Explanation: a) Operator may forget to shutdown the product first when turn off vehicle power. So sudden power lost. b) The operator habitual long press the power button to turn it off.
2. Installing application program leads to the result that system file is damaged.
Explanation: When user install software without according to normal requirement, leading to damaged system file.
3. System has virus.
Explanation: Operator may use USB interface to connect mobile phone. Leads to virus.
Solution: Restore operation system