Problem：
How many kinds of problems that customers can not light up the products?
Reply：
1. Backlight is not on .
2. There is an error in the software initialization program .
3. The interface is not correct. In view of the above problems, the following solutions are proposed .
1) Whether the backlight has burned the lamp with high current, and whether there is false welding of resistance;
2) The power supply should meet the basic requirements of the module, and the module should not be burnt out by too high voltage;
3) Software and interface problems can be contacted with our engineers at any time.
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