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What This Guide Helps With
Troubleshoots intermittent display illumination or controls caused by power, contamination, physical damage, operating state, connections, or a service-level fault.
Step-by-Step Troubleshooting
1. Protect the Patient and Remove Unreliable Controls From Clinical Use
Do not troubleshoot an intermittent display or control problem while the scanner is being relied upon for patient care. If a control fails to respond reliably or the display cannot be read consistently, use another verified bladder scanner.
Inspect the device for damage, fluid intrusion, unusual heat, odor, or evidence of impact.
Expected outcome: Clinical care continues with reliable equipment and the suspect scanner is safe for controlled evaluation. If significant damage, heat, odor, or fluid intrusion is found, remove the unit from service immediately.
2. Confirm Which Function Is Intermittent
Determine whether the complaint involves:
- Display backlight
- One specific soft key or control
- Multiple controls
- Touch response, if applicable to the installed configuration
- The entire display
- Controls only during a particular screen or workflow
Attempt to reproduce the problem during controlled testing.
Expected outcome: The exact intermittent behavior and affected interface are identified. If repeated testing shows reliable operation and the complaint cannot be reproduced, document the evaluation before deciding whether additional observation or service is appropriate.
3. Verify Power and Battery Condition
Operate the scanner using its normal approved power arrangement. Verify that it powers up normally without unexpected dimming, shutdown, or restart.
If the symptom occurs only during battery operation, compare behavior when the device is connected to its approved charging or power source.
Inspect the external power connection and charging interface for looseness or damage.
Expected outcome: Power remains stable and the interface does not change behavior when the unit transitions between expected power conditions. If correcting an external power or charging connection resolves the symptom, complete repeated functional testing and troubleshooting can stop.
4. Clean and Inspect the Operator Interface
With the unit removed from clinical use, inspect the display and control surfaces for:
- Dried gel
- Cleaning residue
- Moisture
- Debris
- Cracks
- Lifting overlays
- Damaged button surfaces
Clean only using facility-approved and manufacturer-compatible methods.
Expected outcome: The interface is clean, dry, and physically intact. If contamination was causing intermittent control response and normal function is restored after cleaning, verify repeated operation and troubleshooting can stop.
5. Check for Position-Dependent or Pressure-Dependent Failure
Operate the scanner on a stable surface without flexing, squeezing, or twisting the housing. Observe whether the display or controls fail only when the device is moved, handled, placed in the cradle, or touched in a certain area.
Do not deliberately flex the enclosure to reproduce a fault.
Expected outcome: The controls and display remain stable during ordinary handling. If normal movement causes the symptom to recur, remove the scanner from service for further evaluation.
6. Verify Normal Screen and Control Behavior
Navigate through normal user-accessible screens and operate each affected control repeatedly.
Confirm that an apparently nonresponsive soft key is actually active on the displayed screen and not intentionally unavailable in that operating state.
Do not enter unauthorized service menus.
Expected outcome: Each applicable control responds consistently in the screens where it should be active. If the reported issue resulted from normal screen-state behavior, document the finding and troubleshooting can stop.
7. Evaluate Backlight Behavior Separately From Image Generation
If the complaint is specifically a dark or intermittent screen, observe closely whether screen content remains faintly visible while illumination changes.
This helps distinguish a backlight-related symptom from loss of the entire displayed image without requiring internal disassembly.
Expected outcome: The display remains consistently readable. If illumination repeatedly drops out while the device otherwise remains active, remove the scanner from service for qualified display-system evaluation.
8. Compare Operation on Known-Good External Power When Appropriate
If approved external power equipment is available, test with a known-good compatible charger, dock, or power accessory as applicable.
Do not substitute unapproved power supplies.
Expected outcome: The symptom either resolves with the approved known-good external accessory or remains with the scanner. If an external accessory is identified as defective, replace it and complete final functional verification.
9. Perform Final Functional Verification
After correction, verify through repeated operating cycles that:
- The display remains continuously readable
- The backlight remains stable
- Applicable soft keys respond consistently
- Touch input, if present, responds correctly
- The device does not restart or freeze
- A test scan can be completed normally
Expected outcome: The interface remains reliable through repeated testing. If all functions operate consistently, the unit may be returned to service according to facility procedure and troubleshooting can stop.
10. Escalate Persistent or Intermittent Failures
If the interface remains intermittent after external power, cleaning, inspection, operating state, and normal controls have been verified, do not open the device or attempt board-level display or switch repair without authorized procedures.
Expected outcome: The unreliable scanner is removed from service and routed for bench or manufacturer-level evaluation.
If the Problem Persists
External power, contamination, physical condition, accessible controls, and operating-state causes have been ruled out. Remaining possibilities may involve the display assembly, control interface, internal connections, power regulation, or another service-level electronic condition.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
- Evaluated using appropriate manufacturer documentation and approved test equipment
- Repaired or configured only by qualified personnel
Following repair, verify all operator controls, display readability, power operation, scan completion, and any applicable safety or performance tests before returning the unit to service.
Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
An intermittent control is a reliability failure even when it works during one test; do not return the scanner to clinical use until operation is consistently reproducible.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the BladderScan BVI 9400 display remained on but a soft key responded only intermittently."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found dried scanning gel and residue around the affected control surface."
Resolution
What action was taken.
Example:
"Clinical Engineering cleaned and dried the control area using an approved method, verified repeated control response and successful test scans, and returned the unit to service."
Helpful Details to Include (If Known)
- Exact control or screen area affected
- Whether the backlight or entire image failed
- AC/charging versus battery operation
- External power accessory condition
- Presence of gel, residue, or moisture
- Physical damage observed
- Whether movement affected the symptom
- Number of successful repeat operations
- Test scan result
- Final device status
Final Thought
Intermittent display and control complaints require patient protection and repeatable verification. Check power, cleanliness, physical condition, and normal operating behavior before suspecting internal electronics, and remove unreliable equipment from service when the fault cannot be confidently resolved.
That is successful troubleshooting.