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What This Guide Helps With
Troubleshooting blank, frozen, intermittent, or unresponsive user-interface components caused by power, connection, obstruction, contamination, accessory, or system-level problems.
Step-by-Step Troubleshooting
1. Protect the Patient and Stop Dependence on Unreliable Controls
If the display, touchscreen, or controls cannot be trusted during a patient examination, stop using the system for clinical imaging and transition to another verified unit as needed. Do not continue an examination if critical information cannot be viewed or controls cannot be operated reliably. Expected outcome: Patient care no longer depends on an unreliable interface.
2. Identify Exactly What Is Unresponsive
Determine whether the entire system is frozen, only one display is blank, the touchscreen does not respond, a limited group of controls is affected, or controls respond intermittently. Confirm whether imaging continues behind the interface problem. Expected outcome: The issue is narrowed to a specific interface component or a broader system freeze.
3. Check System Power and Startup State
Verify that the system is fully powered and has completed normal startup. A blank or inactive display during incomplete startup can be mistaken for an isolated display failure. Record any message or abnormal indicator. Expected outcome: The system is confirmed to be fully started, or the problem is redirected to a startup issue.
4. Inspect the Display and Control Surfaces
Check for liquid, gel, cleaning residue, adhesive, protective material, physical obstruction, or visible damage affecting the touchscreen or controls. Clean only using approved methods and materials. Confirm that nothing is continuously pressing against controls. Expected outcome: Control surfaces are clean, dry, unobstructed, and undamaged. If removing contamination or obstruction restores normal response, proceed to final verification.
5. Check Accessible Positioning and External Connections
Inspect accessible display or console areas for evidence that movement or repositioning has placed tension on visible cables or connectors. Verify only externally accessible connections intended for routine service or user access. Do not disassemble display housings or internal control panels. Expected outcome: No external connection or mechanical positioning issue is causing the problem.
6. Disconnect Nonessential External Peripherals
When appropriate, disconnect nonessential USB devices or externally attached peripherals that could interfere with normal system operation. Recheck the interface. Expected outcome: The interface operates normally without a problematic peripheral. If so, isolate the external device before returning the system to use.
7. Perform a Controlled System Restart
If the controls permit normal shutdown, shut down and restart the system using the normal process. Avoid forced or repeated power cycling unless required by approved service guidance. Expected outcome: The system restarts with responsive displays and controls. If responsiveness remains stable, proceed to verification.
8. Verify Clinical Interface Functions
Check the display, touchscreen, keyboard or control panel functions used for normal echocardiography operation. Verify basic image acquisition and confirm that interface response remains stable. Expected outcome: Required controls respond consistently and the system is suitable for clinical use. Troubleshooting can stop.
9. Escalate Recurrent or Persistent Unresponsiveness
If the interface remains blank, frozen, intermittent, or partially unresponsive after external checks and a controlled restart, remove the system from service. Do not perform internal display, control-board, computer, or wiring repair without proper authorization. Expected outcome: A probable internal hardware, software, or communication problem is appropriately escalated.
If the Problem Persists
Common external contamination, obstruction, peripheral, power, positioning, and restart-related causes have been ruled out. The remaining issue may involve an internal display assembly, touchscreen interface, control electronics, computer subsystem, software, or internal communication path.
Remove the system from service, label it Out of Service, and send it for qualified repair or bench evaluation using appropriate Canon documentation and approved test equipment. Internal repair or software recovery should only be performed by qualified personnel.
Verify all affected controls and complete applicable return-to-service testing after repair. Knowing when an interface can no longer be trusted and removing the equipment from service is proper troubleshooting.
Clinical Use Tip
An echocardiography system with unreliable image display or controls should not remain in clinical use even if scanning appears possible intermittently.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sonography staff reported that touchscreen selections on the Canon Aplio i900 CV were intermittently unresponsive."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found dried ultrasound gel contamination along the touchscreen surface causing unreliable touch response."
Resolution
What action was taken.
Example:
"Clinical Engineering cleaned the surface using the approved method, verified consistent touchscreen and control operation, completed functional testing, and returned the system to service."
Helpful Details to Include (If Known)
- Which display or controls were affected
- Whether the problem was constant or intermittent
- System startup state
- Visible contamination or physical damage
- External peripherals connected
- Response before and after cleaning
- Response before and after restart
- Basic imaging verification result
- Final device status
Final Thought
Remove unreliable controls from patient use, begin with simple surface and external checks, verify stable response before assuming internal failure, escalate persistent problems appropriately, and document the actual cause and final testing.
That is successful troubleshooting.