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Asset Type
Sequential Compression Device (SCD)
Manufacturer
Model
What This Guide Helps With
Unresponsive keypad, blank or dim display, or inability to change settings due to power, connection, or external control interface issues.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the device from active patient use before troubleshooting.
- Expected: Patient placed on alternate DVT prophylaxis.
Verify the Reported Issue
- Power on the unit and attempt to use the keypad and observe the display.
- Expected: Confirm no display, dim display, or unresponsive buttons.
- Why it matters: Confirms true interface failure vs user operation error.
Check Power Source and Cord
- Ensure the power cord is fully seated in both the device and wall outlet. Test outlet with a known working device.
- Expected: Stable power to the unit with no interruption.
- Why it matters: Inconsistent or no power can cause display or keypad failure.
If display returns → stop troubleshooting.
Inspect for Standby or Power Mode Issues
- Confirm the unit is not in standby or partially powered state. Cycle power OFF, wait 10 seconds, then power ON.
- Expected: Full startup sequence with active display.
- Why it matters: System lockups can present as display or keypad failure.
If resolved → stop troubleshooting.
Check Display Visibility Conditions
- Inspect screen for brightness, contrast, or viewing angle issues. Look for very faint text or backlight failure.
- Expected: Clear, readable display under normal lighting.
- Why it matters: Backlight failure may appear as a blank screen even if the unit is functioning.
Inspect Keypad for Physical Issues
- Check for stuck buttons, fluid ingress, damage, or debris under keypad overlay. Press each key individually.
- Expected: Buttons move freely and respond when pressed.
- Why it matters: Physical obstruction or contamination can prevent input registration.
If obstruction cleared and keypad responds → stop troubleshooting.
Check for Alarm or Locked State
- Observe if the unit is in an alarm condition or locked mode preventing input.
- Expected: No lockout preventing keypad use.
- Why it matters: Some conditions may disable input until cleared.
Inspect External Connections (if applicable)
- If the unit uses detachable control panels or connectors, ensure all external connections are secure and undamaged.
- Expected: Secure, intact connections with no bent pins or loose cables.
- Why it matters: Interface communication issues can mimic keypad/display failure.
If the Problem Persists
If power, external conditions, and physical keypad/display issues have been ruled out, the failure is likely internal (display module, keypad membrane, or control board).
Remove the device from service, label it Out of Service, and send for repair or bench evaluation.
Knowing when to stop prevents unnecessary risk and is proper troubleshooting.
Clinical Use Tip
Do not attempt to troubleshoot while the device is in use on a patient. Always transition the patient to a functioning SCD before evaluation.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"SCD display blank and keypad not responding during use."
Cause
What was observed during troubleshooting.
Example:
"Failed display/backlight assembly after external power and keypad checks passed."
Resolution
What action was taken.
Example:
"Removed from service and sent to vendor for repair."
Helpful Details to Include (If Known)
- Outlet tested and verified
- Power cord condition
- Display completely blank vs dim
- Keypad response (none, intermittent, or partial)
- Any signs of fluid ingress or physical damage
- Indicator lights present without display
- Final device status (removed from service)
Final Thought
Display and keypad issues often appear severe but should always be approached by verifying power and simple external causes first. Once ruled out, escalation is appropriate. Proper documentation supports efficient repair and patient safety.
That is successful troubleshooting.