USB stopped working on HKS401-EB23

Greg Harris

2025年05月22日 13:45

Is there a firmware update to try for HKS401-EB23?   My USB stopped working on 1 of 4 ports.  Thank you.

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  TESmart.01

  2025年05月23日 03:33

  Hi Greg,

  Regarding the issue you mentioned with a non-working USB port on your HKS401-EB23 device, we recommend trying a firmware update first. You can download the firmware package and follow the upgrade instructions (SOP) at the link below:

  🔗 Firmware Download & Upgrade Guide:
  https://support.tesmart.com/hc/en-us/articles/47258496549529-HKS401-E23-HKS401-EB23-HKS0201A2U-Hotkey-Chip-Re-programming-Guide

  ⚠️ Please note:
  Firmware updates may not resolve USB port failures. If the port still does not function after updating, we suggest the following checks to determine if it's a hardware issue:

  • If the dedicated keyboard/mouse port is not working, try plugging the keyboard and mouse into a USB 2.0 output port for testing.
  • If the USB 2.0 output port is not working, it is likely a port hardware failure.
  • If the USB input port (connected to your host computer) is not working, try replacing the USB cable or testing with a different computer.

  If testing confirms a hardware fault, please contact TESmart customer support for further assistance.

  Thank you for your understanding and support. Feel free to contact us if you have any other questions.
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  Greg Harris

  2025年05月25日 18:42

  Thank you for the quick reply, I went through the procedure but stopped as my chip was recognized as CH559 instead of CH545.  Is there an alternate firmware file for that chip.

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  TESmart.01

  2025年05月26日 03:47

  Greg Harris 
  Thank you for the update. If your chip is identified as CH559 instead of CH545, unfortunately, the issue cannot be resolved through a firmware upgrade.

  Based on the behavior you've described, it is likely that the port has been damaged. We recommend contacting our after-sales support team to arrange for a device replacement.

  You can reach our support team and submit a replacement request here: HDMI KVM switches Support/Setup/FAQ- TESmart

  Please let us know if you need any further assistance.

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