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Microsoft Teams Room is frozen with “No display connected"

1. Verify Display Input & Signal Path

  • Confirm the display is set to the correct HDMI input
  • Try switching input source manually on the TV/monitor
  • Check if any signal (even BIOS/boot screen) appears during restart

👉 If no signal even during boot → likely hardware/cable/port issue

2. Swap HDMI Path (Very Important)

  • Replace HDMI cable with a known working one
  • Try a different HDMI port on the display
  • If using:
    • Extenders (HDBaseT)
    • Wall plates
    • Switchers
      → bypass them completely and connect directly

3. Check MTR Compute Unit Output

  • Connect the MTR (Intel NUC / compute) directly to a different monitor

👉 Outcomes:

  • Works on another display → issue with room display or cabling
  • Still no output → issue with compute unit or graphics output

4. Force EDID / Resolution Reset

Sometimes MTR gets stuck due to EDID mismatch:

  • Power OFF:
    • Display
    • MTR compute
  • Power ON sequence:
    1. Display ON first
    2. Wait 1–2 mins
    3. Then power ON MTR

5. Check USB-C / HDMI Adapter (if used)

  • If your setup uses adapters:
    • USB-C to HDMI
    • Mini DP to HDMI
      👉 These commonly fail — replace/test with spare

6. Remote Access / Peripheral Check

  • Check if:
    • Touch panel (Crestron/Poly) is responsive
    • Camera LED or peripherals are active
  • Try remote into MTR (if network connected)

👉 If system is reachable but no display → confirms display path issue

7. BIOS / Recovery Check

  • During reboot, press key (F2/F10 depending on device)
  • Check if BIOS screen appears

👉 No BIOS display = strong indication of:

  • Faulty HDMI port
  • Failed compute unit GPU

8. Last Step Before Escalation

  • Try a full power drain:
    • Disconnect power completely
    • Hold power button 10–15 sec
    • Reconnect and boot

When to Escalate

Escalate to Tier 2 / OEM if:

  • No output on multiple displays
  • No BIOS visibility
  • Known good cables tested
  • Direct connection tested

How do I manage devices remotely so that I don't need to escalate issues as they happen? 

Our SPORTrack platform gives you the ability to remotely monitor and manage all of your devices, across the globe. Check out the SPORTrack platform here.