What is the status of the 17_17171717_ prompt on the BQ4050 communication page?

This most often means that the gauge is in ROM mode (the FW didn't launch). You can try programming the .srec with a known compatible firmware to fix this.

I can't re-burn the .srec file now, but I can still show the communication interface, is there any good way to re-burn the .srec file again?

How to do it, it would be better if you could give detailed steps, thank you very much.

The communication interface is green, not gray, which means that communication is still being made.

In bqStudio, click on Firmware, select the .srec in F/W Programming and click on "Program". If that doesn't work then either the EV2400 doesn't work or the gauge is bricked.