Error 4: Upper Display Communications issue
Cause:
Main computer board is receiving incomplete, erroneous, or no information from the upper display that
occurred even after three re-tries. The upper display is not required for the treadmill to function safely,
so this is a stored error only. If and when the product is in Dormant, the main computer board will attempt
to cycle power or reset the Upper Display system.
Service: LED Console
If this occurs in Dormant, the cause is likely a software defect or power fluctuation. If this occurs mostly
in active mode, it could be due to ESD events or increased data traffic.
• Check internal cabling between the MCC and Display board.
• Ensure there are no cracks or openings in the upper display’s console decal or membranes
• Verify no moisture intrusion has compromised the MCC, display or cabling.
Service: EPEM (Embedded PEM or E3) Consoles
If this occurs in Dormant, the cause is likely a software defect or power fluctuation. If this occurs mostly
in active mode, it could be due to ESD events or increased data traffic.
• Check internal cabling between the MCC and EPEM.
• Ensure there are no cracks or openings in the upper display’s console decal or membranes
• Verify no moisture intrusion has compromised the MCC, EPEM or cabling.
Service: NTS (CybexGO or Embedded Netpulse) Consoles
• NTS computers can reset and not recover, requiring a second reset or power cycle. Always attempt
this first to remedy the situation.
• NTS and MCC could potentially be out of sync, requiring a full-system power cycle. If this recurs, the
NTS firmware may need to be updated.
• Call Cybex and have a technician verify the firmware and update it if necessary.
• Attempt the Check for Updates button in the Toolbox/Setup/AV Display/Network Setup.
• Verify the code versions in Toolbox/OEM Diags/Display Module match known production code
combinations for:
• npcybex: Netpulse software related to the N5i product line with Cybex modifications
• plcybex: This is the code responsible for the Cybex look and feel on-screen
• npcomm: This is the interpreter between the MCC and NTS
• Update the software in the MCC, and then update the firmware in the NTS as a last resort.
• If this occurs mostly when active, it could be due to ESD events or increased data traffic.
• Check internal cabling between the MCC and the NTS.
• Ensure there are no cracks or openings in the membranes.
• Verify no moisture intrusion has compromised the MCC, NTS or internal board s and cabling.
• If touches on the NTS screen are heard as clicks, the NTS communications to the MCC is working.
If touches on the NTS do not bring the MCC out of dormant, MCC to NTS communications is lost.
Contact Cybex if this ever occurs in the field:
• CSAFE may have been enabled on this NTS console (need to disable it)
• SBC RS232 may be faulty
• Internal cabling may be faulty
Page 81 of 261
Cybex 770T/790T Treadmill Part Number
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