The LED corresponding to the SIM card is not lighting up

Banana Pi Router design BPI-R4/BPI-R4 Pro(MT7988)
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Hello, experts. I have a question. After installing the 5G module and SIM card on the R4-Pro, the functions are operating normally, but the LED（SIM1） corresponding to the SIM card is not lighting up. What could be the reason for this?

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  1. Its lights are controlled by a module, and it’s possible that the module is set to not light up. 2. You can also check if the resistor is properly connected.