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Manufacturer
Model
What This Guide Helps With
Display loss or instability caused by power problems, brightness settings, software lockup, environmental conditions, accessories, or display hardware failure.
Step-by-Step Troubleshooting
1. Protect the Patient and Remove the Monitor From Use
Do not troubleshoot an unreadable or frozen display while a patient depends on the device. Transfer monitoring to another verified monitor before disconnecting the Rad-97.
Expected outcome: Patient monitoring continues without relying on the affected display.
2. Confirm the Display Condition
Determine whether the display is completely blank, unusually dim, flickering, distorted, delayed, or frozen while values remain unchanged.
Observe whether alarm lights, sounds, charging indicators, or network indicators continue to function.
Expected outcome: The display symptom is reproduced and separated from a complete power failure.
3. Verify AC Power and Battery Operation
Inspect the approved power supply, cord, plug, and device power connection for damage or looseness.
Test the device on a verified outlet and observe behavior on both AC and battery power when safe.
Expected outcome: The monitor remains powered and the display is stable on both available power sources. If corrected by reconnecting power, troubleshooting can stop after verification.
4. Check Display Brightness and Power-Saving Settings
Verify that the brightness was not reduced, the screen was not intentionally placed in a dimmed state, and the active profile has appropriate display settings.
Compare with an approved Rad-97 configuration when available.
Expected outcome: Normal brightness returns and remains stable. If so, troubleshooting can stop after final testing.
5. Inspect for Physical or Environmental Causes
Check the display for cracks, impact damage, fluid intrusion, contamination, or pressure from mounting hardware.
Allow the device to reach a normal operating environment if it was exposed to excessive heat, cold, moisture, or condensation.
Expected outcome: No external damage or environmental condition explains the problem.
6. Disconnect Nonessential Accessories
Remove USB devices, external communication cables, and other nonessential accessories.
Restart the monitor in a basic standalone configuration.
Expected outcome: The display operates normally without external accessories. If one accessory causes the fault, remove that accessory from use.
7. Perform a Normal Restart
With the device out of clinical use, complete a normal shutdown and restart.
Observe the startup sequence, logo, indicators, touch response, and whether the screen freezes again.
Expected outcome: The device boots normally and the display remains responsive. If stable, continue to final verification.
8. Check Touch and Control Response
Verify that the screen and physical controls respond consistently and that displayed values update normally.
Do not enter unauthorized service menus or alter protected configurations.
Expected outcome: Displayed information updates and controls respond without delay or freezing.
9. Perform Functional and Alarm Verification
Connect approved test accessories and confirm that saturation, pulse rate, pleth waveform, menu navigation, visual alarms, and audible alarms display correctly.
Operate the device long enough to confirm that flickering or freezing does not return.
Expected outcome: The display remains clear, stable, and responsive throughout testing.
10. Escalate Persistent Display Failure
A monitor with an unreadable, flickering, or intermittently frozen display is not reliable for clinical use.
Expected outcome: The device is removed from service and sent for qualified evaluation.
If the Problem Persists
External power, brightness settings, attached accessories, environmental exposure, and temporary software state have been ruled out.
The remaining cause may involve the display assembly, internal power distribution, processor, software, connector, or another service-level condition. Remove the Rad-97 from service, label it Out of Service, and send it for repair or bench evaluation using approved test equipment and current manufacturer documentation.
Do not perform deep disassembly or board-level repair. Complete display, control, monitoring, electrical safety, and alarm verification before return to service.
Clinical Use Tip
A frozen display may continue showing outdated values; never assume a visible number is current unless the waveform and display are actively updating.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the Rad-97 display became dim and intermittently flickered during use."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found a loose connection at the external power supply that caused unstable operation while the battery was nearly depleted."
Resolution
What action was taken.
Example:
"Secured the approved power connection, charged the unit, confirmed stable display operation on AC and battery power, verified monitoring and alarms, and returned it to service."
Helpful Details to Include (If Known)
- Blank, dim, flickering, distorted, or frozen condition
- AC and battery behavior
- Outlet tested
- Power supply and connector condition
- Brightness or power-saving setting
- Physical or liquid damage
- Connected accessories
- Startup behavior
- Control and touch response
- Final functional and alarm results
Final Thought
Maintain alternate monitoring, distinguish display failure from power failure, verify simple external causes before assuming internal damage, and escalate any display that cannot be trusted.
That is successful troubleshooting.