IWR6843ISK: The micro USB is connected to the PC USB for power supply, but there is no response, and the onboard LED is not lit.

Hello User,

Sorry for the delay. 

Please help me with understand a couple of things here : 

1. Are you using this board for the first time? If yes, when was it purchased?

2. As soon as you supply power to the USB, do you not see the 5V and PGOOD LED turn up?

Looks like there is an issue with the power supply network.

Regards,

Ishita

Hello, this is the first time to use. I bought it last month. I saw the led light flashing for a moment, and it never turned on again. The debugging green board purchased with the red board is all normal. Thank you very much.

Hello Yangfan,

Thanks for the information. 

Can you please review the below link:

http://www.ti.com/lit/zip/swrr161

Refer to the "HW bringup guidlines" tab in the excel sheet and post your concern if you find any deviation from the expected response. 

Regards,

Ishita

I'm very sorry, I have just used this board for less than two days, technical understanding and equipment (oscilloscope, etc.) do not support the completion of the entire testing process

Hello Yangfan,

I understand. 

Looks like there is an issue with the power supply network.

Please go through the return/replacement process highlighted on the TI page : https://www.ti.com/support-quality/additional-information/customer-returns.html if this was purchased directly from TI.

Regards,

Ishita