We currently have three NX modules with the following problem.
We use the 5V voltage pin of GPIO to connect two fans to dissipate heat, but after power off, power on again cannot start.
We checked the voltage of the register with an oscilloscope, and found that the output voltage of a pin of the register was too high, which resulted in the TF card not being found and unable to boot.
Please give your opinion, we confirm that the voltage of the register is abnormal, which causes the TF card not to be recognized.
Is this caused by using the 5V voltage pin of the GPIO? Please help, thanks a lot.