GE Healthcare MAC 5

Asset Type

Electrocardiograph (EKG) Machine

Manufacturer

GE Healthcare

Model

MAC 5

What This Guide Helps With

This guide helps troubleshoot Error: No Network Connection on the GE Healthcare MAC 5 when the device is not connected to the network. This condition may prevent worklist download, ECG transmission, archive communication, MUSE communication, EMR communication, or other LAN/WLAN network functions.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• Confirm the MAC 5 is not actively being used for a patient ECG.
• If the device cannot transmit ECGs, worklists, or patient demographics during clinical use, make sure staff save or print the ECG locally if needed.
• Use another ECG machine if network communication is required for immediate clinical workflow.
• Expected result: Patient testing is not delayed or dependent on a device with unresolved network communication failure.

Verify the Reported Error and Behavior

• Confirm the screen displays Error: No Network Connection.
• Ask when the message appears, such as at startup, when opening worklist, when attempting to send ECGs, when connecting to LAN, when using WLAN, or after the device was moved.
• Identify the associated impact, such as no worklist download, ECGs not transmitting, MUSE or archive destination unavailable, missing network icon, missing wireless signal, or local operation without network communication.
• Expected result: The No Network Connection error is clearly observed or reproducible.

Check Whether the Device Is Using LAN or WLAN

• Determine whether this MAC 5 is expected to connect by wired LAN, wireless WLAN, or both.
• Verify the correct network method is enabled in the device configuration.
• Expected result: The MAC 5 is configured for the connection type used in that clinical area.

Check the Wired LAN Connection

• If using LAN, inspect the Ethernet cable at the MAC 5 and the wall jack.
• Reseat both ends of the cable.
• Try a known-good Ethernet cable if available.
• Expected result: The network connection indicator returns, or the No Network Connection error clears.

Check the Network Wall Jack

• Plug the MAC 5 into a known-good network jack in the same area if available.
• If another MAC 5 or network device works on the original jack, the jack is less likely to be the problem.
• Expected result: The device connects on a known-good jack.

Check for Link Lights or Connection Indicators

• Inspect the Ethernet port, cable connection, dock, or adapter area if visible.
• Look for link or activity lights if the hardware provides them.
• No link indication may suggest a bad cable, inactive wall jack, disabled switch port, or device-side network issue.
• Expected result: Link or activity indication appears when connected to an active network jack.

Check Wireless Signal and Location

• If using WLAN, confirm the MAC 5 is in an area with known wireless coverage.
• Move the device to a location where another MAC 5 or approved clinical wireless device normally connects.
• Expected result: WLAN signal appears and the No Network Connection error clears.

Confirm WLAN Is Enabled and Correctly Configured

• Verify the device is set up for the correct wireless network profile.
• Check for obvious configuration problems such as WLAN disabled, wrong SSID, incorrect security setting, expired or changed credentials, incorrect IP configuration, or a WLAN profile that is not valid for the current location.
• Expected result: The WLAN configuration matches the approved hospital network settings.

Restart the MAC 5

• After saving any needed ECG data, power cycle the MAC 5.
• Allow the device to fully restart and attempt network reconnection.
• Expected result: The network connection restores after reboot if the issue was temporary.

Check Whether the Issue Affects One Device or Many

• Ask whether other MAC 5 units in the same department are also offline.
• Compare with a known-working MAC 5 using the same LAN jack, WLAN area, or workflow.
• Expected result: The issue is narrowed to one device, one room, one area, or a wider network problem.

Check Destination-Specific Communication

• Determine whether the MAC 5 has no network connection at all or whether it is connected but cannot reach a destination such as MUSE, worklist, archive, or EMR.
• Separate a true No Network Connection condition from a server unavailable, destination rejected, or order/worklist problem.
• Expected result: The error is confirmed as a network connection failure, not only a failed send destination.

Verify Device Configuration With Site Standards

• Compare the MAC 5 network settings against approved site configuration.
• Confirm settings such as IP address method, static IP or DHCP, gateway, subnet, DNS, WLAN profile, destination settings, and device location or department assignment.
• Expected result: Device settings match the hospital’s approved MAC 5 configuration.

Check for Recent Changes

• Ask whether the device was recently moved, taken offsite, reconfigured, repaired, connected to a different network jack, or affected by IT or vendor network changes.
• Correct any change that appears related to the network failure.
• Expected result: Any recent change is identified and corrected if related.

Isolate External Versus Device-Related Failure

• If the MAC 5 fails on multiple known-good LAN jacks or cannot connect to WLAN in a known-good coverage area, suspect a device-side issue.
• If another MAC 5 also fails on the same jack or in the same wireless area, escalate to IT or network support.
• Expected result: The problem is narrowed to network infrastructure, configuration, or device hardware/software.

Stop When Resolved

• If reconnecting LAN, correcting WLAN configuration, moving to a known-good network area, or restarting the device clears the error, confirm normal operation.
• Test the appropriate workflow, such as worklist download, ECG send, archive transmission, or network status indication.
• Return the device to service only after successful communication is confirmed.

If the Problem Persists

If external and common causes have been ruled out, persistent No Network Connection errors may indicate a deeper device configuration, network adapter, WLAN module, software, or infrastructure issue.

Remove the MAC 5 from service if it cannot reliably communicate and network transmission is required for clinical workflow.

Label the device Out of Service and send it for bench evaluation or escalate to the appropriate GE Healthcare/vendor and IT/network support teams.

Clinical Use Tip

Never troubleshoot network settings on an active patient. Move the patient to a backup device first, save or print clinically needed ECGs before restarting the device, and maintain therapy or diagnostic workflow continuity with another ECG machine when immediate transmission is required.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"GE Healthcare MAC 5 displays No Network Connection. User reports device cannot connect to the network and ECGs/worklist communication are unavailable."

Cause

What was observed during troubleshooting.

Example:
"LAN/WLAN connection issue confirmed. External network cable, wall jack, wireless coverage, and device network configuration checked. Fault resolved after reconnecting/configuring network, or persistent fault indicates likely device-side network/configuration issue requiring further evaluation."

Resolution

What action was taken.

Example:
"Verified reported error, inspected LAN/WLAN connection, reseated or replaced network cable, checked known-good network jack or wireless area, confirmed network configuration, restarted device, and tested ECG transmission/worklist communication. Device returned to service after successful network connection, or removed from service and escalated for repair/network support."

Helpful Details to Include (If Known)

• Alarm behavior, including the exact error displayed and when No Network Connection appears.
• Accessories swapped, including Ethernet cable, adapter, dock connection, or other external network accessory.
• Power behavior, including whether a restart was performed and whether the error returned after reboot.
• Environmental factors, including device location, WLAN coverage, network jack used, recent move, offsite use, or department change.
• Indicator lights, including Ethernet link lights, network icon status, WLAN signal status, or other connection indicators.
• Final device status, including whether worklist download, ECG send, archive transmission, or network connection test passed before return to service.

Final Thought

Network errors should be handled logically: protect patient data first, confirm the displayed error, check simple external causes, verify configuration, and separate device failure from hospital network issues. Clear CCR documentation helps both Clinical Engineering and IT understand what was tested and what remains unresolved.

That is successful troubleshooting.