Schiller CARDIOVIT AT Series

Asset Type

Electrocardiograph (EKG) Machine

Manufacturer

Schiller

Model

CARDIOVIT AT Series

What This Guide Helps With

Unresponsive touchscreen or keypad, delayed input, or inability to control the device due to power, settings, or interface issues.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• If the device is in use, stop acquisition and move the patient to another functioning EKG machine.
• Expected: Patient monitoring continues uninterrupted.
• Why it matters: Loss of control prevents safe operation and accurate ECG acquisition.

Verify Device Power and Screen Activity

• Check if the device is powered on and displaying any activity.
• Confirm power LED indicators are on
• Look for screen backlight or faint image
• Attempt to power the unit off and back on
• Expected: Device powers on with visible display.
• Why it matters: A non-responsive screen may be related to power or system freeze.

Perform a Full Reboot

• Power cycle the device to clear temporary software issues.
• Shut down the device completely
• Disconnect AC power for 30 seconds
• Reconnect and power back on
• Expected: System boots normally and input becomes responsive.
• Why it matters: Software lockups are a common cause of input failure.

Inspect Touchscreen Surface or Keypad Condition

• Check for physical issues affecting input.
• Ensure screen is clean and dry
• Remove gloves or moisture interfering with touch response
• Inspect keypad for stuck, damaged, or worn buttons
• Expected: Clean surface and functional buttons allow normal input.
• Why it matters: Contamination or physical damage can block input recognition.

Check for Screen Lock or Software Mode Restrictions

• Verify the device is not in a locked or restricted mode.
• Look for lock icons or prompts on screen
• Attempt to access menus using alternate buttons (if available)
• Confirm user interface is not frozen on a specific screen
• Expected: Device allows navigation and input.
• Why it matters: Some modes prevent interaction or limit controls.

Test External Input (if applicable)

• If the model supports external input devices.
• Connect a compatible external keyboard or input device (if available)
• Expected: External input works, indicating touchscreen/keypad issue.
• Why it matters: Helps isolate whether failure is limited to the interface hardware.

Inspect for Signs of Physical Damage or Liquid Intrusion

• Check for cracks in the screen
• Look for residue, fluid exposure, or sticky buttons
• Note any unusual behavior (ghost touches, intermittent response)
• Expected: No visible damage or contamination.
• Why it matters: Physical damage often requires repair and cannot be corrected through troubleshooting.

If the Problem Persists

If all external causes have been ruled out and the touchscreen or keypad remains unresponsive, the issue is likely internal (touch controller, keypad matrix, or mainboard interface).

Remove the device from service, label it Out of Service, and send it for repair or bench evaluation.

Knowing when to stop prevents unnecessary risk and ensures proper resolution.

Clinical Use Tip

Do not attempt to troubleshoot input issues while the device is actively being used for patient diagnostics. Always transition the patient first.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"EKG touchscreen not responding to input during patient setup."

Cause

What was observed during troubleshooting.

Example:
"Touchscreen unresponsive after reboot; no external damage noted."

Resolution

What action was taken.

Example:
"Removed from service and sent for evaluation of touchscreen interface."

Helpful Details to Include (If Known)

• Power indicator status
• Screen backlight present or not
• Touch vs keypad behavior
• Signs of physical damage or contamination
• Reboot results
• External input test results (if applicable)
• Final device status

Final Thought

Input failures should always be approached starting with power, software, and external factors before assuming hardware failure. Protecting patient safety and recognizing when escalation is required are key responsibilities. Proper documentation ensures accurate tracking and efficient repair.

That is successful troubleshooting.