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What This Guide Helps With
Addresses missing external video caused by display selection, cable, adapter, input, compatibility, resolution handling, or output hardware problems.
Step-by-Step Troubleshooting
1. Protect the Patient and Maintain Primary Visualization
Do not depend on an external display as the only airway image unless the complete video path has been verified. Maintain the GlideScope’s primary display and a backup airway method during troubleshooting.
Do not adjust external video connections during an active airway procedure.
Expected outcome: Primary airway visualization remains reliable while the external-output issue is evaluated.
2. Confirm the Exact External-Output Failure
Determine whether the external monitor shows no signal, intermittent video, distorted image, incorrect color, or delayed display. Ask whether the output previously worked with the same cable and receiving display.
Reproduce the issue using the reported setup away from patient care.
Expected outcome: The failure is defined and the involved source, cable, adapter, and receiving display are identified.
3. Verify the GlideScope Primary Image
Confirm the GlideScope monitor displays a stable live image. External output cannot be evaluated accurately if the source image is already failing.
Expected outcome: The primary display shows normal live video. If not, troubleshoot the source image first.
4. Verify the Receiving Display and Input Selection
Confirm the external monitor or recorder is powered and set to the correct HDMI or video input. Test its input using another known-good approved source when permitted.
Expected outcome: The receiving device and selected input are functional.
5. Inspect and Reseat the Video Cable
Disconnect and inspect the HDMI or approved external-video cable for bent contacts, damaged connector shells, pinching, loose strain reliefs, or contamination.
Reconnect both ends fully. Avoid side-loading the connectors.
Expected outcome: The cable is intact and securely seated. If the external image appears and remains stable, complete final verification and stop troubleshooting.
6. Inspect Any Approved Adapter or Interface
If the installation uses an approved adapter, converter, wall plate, cart interface, or distribution device, verify power, seating, and correct signal path.
Bypass optional infrastructure with a direct approved connection when practical and authorized.
Expected outcome: The external image works through a direct connection or the failed intermediate interface is identified.
7. Test With a Known-Good Approved Cable
Replace the suspect cable with a known-good cable of the correct type and suitable length.
Expected outcome: A stable image with the known-good cable identifies the original cable as defective.
8. Test Another Verified External Display
Connect the GlideScope output directly to another verified compatible display or recorder when available.
Expected outcome: The result determines whether the failure is associated with the GlideScope output or the original receiving device.
9. Check User-Accessible Output Settings
Review normal user-accessible settings related to external display output. Compare with another identical working system when available.
Do not enter restricted service menus or make unauthorized resolution, firmware, or configuration changes.
Expected outcome: External output is enabled and set appropriately for the supported configuration.
10. Perform Complete Video-Path Verification
Confirm live video appears simultaneously where expected, remains stable during normal cable movement, and maintains acceptable orientation, color, and timing. Verify the primary display continues to operate normally.
Expected outcome: The full external-video path is stable and clinically usable. The system may return to service after required checks pass.
If the Problem Persists
The primary image, receiving display, selected input, cable, adapters, direct connection, and user-accessible settings have been evaluated. The remaining cause may involve the GlideScope output connector, internal video-output circuitry, software, unsupported signal conversion, or facility audiovisual infrastructure.
Remove the device from service if external output is required for the clinical workflow. Label the affected equipment Out of Service and send it for qualified repair or coordinated evaluation with audiovisual or information technology personnel as appropriate.
Use manufacturer documentation and approved test equipment. Return-to-service testing must verify the entire source-to-display path. Recognizing when the problem belongs to internal hardware or external infrastructure is proper troubleshooting.
Clinical Use Tip
Verify both the primary GlideScope image and the receiving display before procedures that require team viewing or external recording.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the external procedure monitor displayed “no signal” from the GlideScope."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found that the receiving monitor was set to a different HDMI input than the connected GlideScope cable."
Resolution
What action was taken.
Example:
"Clinical Engineering selected the correct input and verified a stable external image while the primary GlideScope display remained normal."
Helpful Details to Include (If Known)
- No signal, intermittent, distorted, or delayed output
- Primary-display condition
- Receiving-display make and input used
- Cable and adapter condition
- Direct-connection result
- Known-good cable result
- Alternate-display result
- User-accessible output setting
- Full signal-path verification
- Final device status
Final Thought
Preserve primary airway visualization, troubleshoot the external video path from source to receiver, verify cables and input selection before assuming internal failure, and coordinate escalation with the correct support group.
That is successful troubleshooting.