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failures and solutions VIII
No displaying on LED module
1. Wrong module input voltage
Solution: Module input voltage should be 5V or 3.3V
2. Input signal cable (flat cable) not connect well
Solution: Reconnect the input signal cable (flat cable)
3. Input signal cable (flat cable) break down
Solution: Change the input signal cable (flat cable)
4. 74HC245 IC break down
Solution: Change 74HC245 IC
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