DP 1.4 KVM - USB Port 1 Issues

Level1 Store KVM Helpdesk
1

KVM Model:

Display Port 1.4 KVM Switch - Dual Monitor

USB Interface (5-gigabit or 10-gigbit):

5-gigabit

Problem:

I went to use my KVM, which hasn’t been used in about a year, and I’m having trouble getting USB connections through the first port. It seems to work fine on the second port.

I’ve tried various combinations of the hotkeys [lctrl, lctrl, F7] and [lctrl, lctrl, u] and can’t seem to find any scenario I can get the first USB port to output. I’m a little worried it might be dead, but wanted to sanity check to see if maybe I’m missing troubleshooting steps I can take.

Appreciate any help!

Other Notes:

  • Using a Window 11 machine and a MacBook Pro.
  • HID and the USB 3 ports have the same behavior.
  • Regardless of which OS is plugged into which port, the second port seems to be working fine.
  • If I toggle to the first port, and try using the USB from the second port it doesn’t work.
  • I have tried various keyboards and a USB flash drive
  • I have tried leaving the KVM unplugged for a couple of minutes and replugging it back in.
  • I have tried another cable
2

It seems like you’ve went through most of the basic troubleshooting I’d recommend.

The one thing I’d recommend for science,

  • try unplugging everything. All USBs, DisplayPort connections, aux, etc. Leave it there for 5 minutes.
  • Plug the Windows 11 PC’s displayport cable normally into it a monitor.
  • Plug the Windows 11 PC’s USB cable into it and the KVM port 1.
  • Plug in 1 basic peripheral into the KVM, like your mouse.
  • Plug in the KVM.

So, you should only have 3 things plugged into your KVM: port 1 USB connection, mouse, and power. This is just eliminating all other factors for a clear “does it work at all” test.

3

A very late reply to this.

I do appreciate your troubleshooting steps.

I was trying again today to get these working and went through the steps again, but no matter what combination of what USB ports are plugged into either the input or output it doesn’t seem to work. Now it seems like they are all broken, regardless of port they are plugged into.

They do provide power, but the data just seems to be broken.