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