Acer KB272 Monitor screen quit showing attached Chromebook CB515-HT screen ... Why?

glitter
glitter Member Posts: 1 New User
edited May 22 in Monitors

I just bought and installed the following Acer components:

  1. LCD Monitor KB2 Series/KB272 (27" screen) P/N UM.HK2AA.004
  2. 5-IN-1 USB C Hub (USB-C to HDMI) Model #ODK4C0; P/N ZL.DCKCC.02T

The 5-IN-1 USB C Hub's cable is connected to the Chromebook and its ports are configured per the following:

  1. HDMI port to HDMI on KB272
  2. USB 2.0 not used
  3. USB 2.0 not used
  4. USB 3.0 HP Smart Tank 5100 Series Printer
  5. USB-C Power to the hub

I followed instructions and installed everything correctly, powered up, went to Chrome and saw the new display and made required adjustments. The Chromebook screen appeared on the KB272 and I dimmed the Chromebook screen. So everything seemed to be working initially.

Now it does not!

  1. When I go to look for the KB272 in Chromebook settings (lower right-settings-device-Displays) there is no sign of the new monitor
  2. The KB272 is powered up and shows in its lower right corner (when you push the External control): Input: HDMI 1.4; Auto Source: Off (if On it does not matter)
  3. I have powered off/on everything and nothing changes:
    1. The KB272 goes through it's sequence and shows "No Signal".
    2. The Chromebook operates like the KB272 is not there

I'm sure there is a simple a simple explanation or procedure I am missing to make it consistent, e.g. open Chromebook, cast screen to KB272, sound, etc.

Thanks

Answers

  • Sharanji
    Sharanji ACE Posts: 5,252 Pathfinder

    @glitter

    Some USB-C hubs require adequate power to operate correctly. If the hub isn't receiving enough power, it may not function as intended. You might want to try a direct USB-C to HDMI adapter instead of a hub to check the issue.

    I hope this helps! If this was useful, please hit 'Yes' or 'Like'! Thanks! 😊

  • Diya1811
    Diya1811 Ally Posts: 742

    @glitter

    Ensure the HDMI cable is securely connected and manually set the monitor’s input source to HDMI. Restart all devices in sequence—monitor first, then Chromebook, then reconnect the USB-C hub. Check the display settings to see if the monitor is recognized, and if not, try disconnecting and reconnecting the HDMI cable. If the issue persists, test the monitor with another device to determine whether the problem is with the monitor or Chromebook.

    Click on "Yes" if it answers your question or Click on "Like" if you find my answer useful