DKS203-M24-USBK Two monitors blank on switch to Computer 1

Joe

April 09, 2026 11:26 Edited

I just received a DKS203-M24-USBK and so far I'm having mixed feelings about it.

I have 3 monitors, an LG and 2 identical ASUS monitors.
Computer1: is a PC with a 1080 graphics card
Computer2: Is a laptop connected to a Dell wd22tb4 dock

When I switch to Computer 2, everything is fine, all 3 monitors connsistantly switch as they should. When I switch to Computer 1 the two ASUS monitors are black. I have to power the monitors off and back on to get video. I also noticed that if Computer 1 times out the display, when I switch to it and move the mouse to activate the screens, it works fine. 

I tried swapping cables including connecting the two ASUS monitors with the included DP cables but the issue still remains. Is there anyway to resolve this problem because I don't think it's worth keeping if I have to keep power cycling the monitors

Another thing I noticed. If I disconnect Computer 2 and switch from 1 to 2 and then back to 1, all there screens come on as they should.

 when switching to computer 1

0

• Official comment

  

  TESmart.01

  April 14, 2026 08:37

  Dear Customer,

  Thank you for contacting TESmart Support, and thank you for describing the issue in such detail.

  Based on your description, the KVM does not appear to have a complete output failure, because all three monitors switch normally on Computer 2, and the two ASUS monitors on Computer 1 can also display correctly after the monitors are powered off and back on. This suggests the issue may be related to monitor wake-up, signal re-handshake, or EDID negotiation when switching back to Computer 1.

  It is also possible that Computer 1 is entering a display sleep or low-power state. In some cases, when the system or GPU does not fully reinitialize all external displays during switching, only part of the display group may wake correctly until the monitors are re-detected. The fact that video can return normally when Computer 1 has timed out the display and is then reactivated by mouse movement may point in that direction, although this still needs to be confirmed through testing.

  To help isolate the cause, we recommend the following steps:

  1. Cross-test the video input paths on Computer 1
     Please swap the DisplayPort input connections for the affected ASUS monitors with the working monitor path and test again. This helps confirm whether the problem follows a specific KVM input channel, cable path, or monitor path.
  2. Test with the EDID emulator enabled and disabled
     Please check whether the behavior changes after toggling the EDID emulator setting.
     Hotkey: Right Ctrl + Right Ctrl + F5
  3. Check the power/sleep behavior of Computer 1
     Please temporarily disable display sleep, monitor timeout, and any GPU power-saving related settings on Computer 1, then test the switching behavior again.
  4. Test the affected monitors one at a time if possible
     If practical, please try reducing the setup temporarily and test whether one ASUS monitor alone behaves differently from two ASUS monitors together. This may help identify whether the issue is related to multi-display wake timing on Computer 1.
  5. Confirm graphics card output behavior directly
     If possible, please connect Computer 1 directly to the monitors without the KVM and verify whether the ASUS monitors wake consistently after display sleep or source re-detection. This helps determine whether the behavior is coming from the GPU/display handshake side rather than the KVM itself.

  The fact that all three screens on Computer 1 work normally when Computer 2 is disconnected is also an important clue. This may indicate that the issue is related to switching negotiation between the two connected systems rather than a simple hardware failure on the KVM itself.

  If you would like, please send us:

  • a photo of the rear-panel wiring for both computers and all three monitors
  • the exact graphics output connections used on Computer 1
  • whether toggling the EDID setting changes the behavior

  With that information, we can help you continue narrowing down the cause.

  Best regards,
  TESmart Technical Support

Please sign in to leave a comment.