# Em7430 no com port after vid:pid change

**URL:** <https://forum.sierrawireless.com/t/em7430-no-com-port-after-vid-pid-change/30392>\
**Category:** MC/EM Series\
**Created:** [August 5, 2023, 6:29am UTC](https://forum.sierrawireless.com/t/em7430-no-com-port-after-vid-pid-change/30392 "2023-08-05T06:29:43Z")\
**Posts on this page:** 1\
**Showing post:** 31

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**Author:** ![857487](https://avatars.discourse-cdn.com/v4/letter/8/858c86/32.png) [@857487](https://forum.sierrawireless.com/u/857487)\
**Post date:** [May 1, 2024, 6:43pm UTC](https://forum.sierrawireless.com/t/em7430-no-com-port-after-vid-pid-change/30392/31 "2024-05-01T18:43:33Z")

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One DW5816e was successfully refreshed and can be used normally, while another DW5816e failed to refresh its firmware.  
Refresh using the method in the following post:

> [@Can't seem to get EM7455 MR7VT to flash to generic firmware](https://forum.sierrawireless.com/t/cant-seem-to-get-em7455-mr7vt-to-flash-to-generic-firmware/25459/14):
>
> Will that allow me to bypass the need for this?

Failed DW5816e refresh log and related information:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/2/20b4932952d75514d5a1b6945386955f3a592b3c.jpeg)

 ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/0/0afcd73848bc503f3ec68b411323f9f98ab84119.png)

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_[View the full topic](https://forum.sierrawireless.com/t/em7430-no-com-port-after-vid-pid-change/30392)._