CEM3 Boot Issues
Not Booting - Screen Blank
Symptoms
Unit does not boot
DMX A, B, Panic LEDs solid ON. This gives the appearance that the CEM3 is stuck in Emergency
LCD blank, but backlight ON
Network LED blinking
Explanation of Issue
There can be multiple causes of this issue, none of which are repairable in the field
Fix/Solution
Please contact ETC Technical Services to begin the RMA process
Not Booting - Rebooting
Symptoms
LCD shows ETC CEM
May get to version number or just before version number before resetting
Explanation of Issue
The FPGA or DSP might have failed in a way that is preventing the CEM3 from booting correctly. This is not repairable in the field
Fix/Solution
Please contact ETC Technical Services to begin the RMA process
Not Booting - Stuck on "ETC CEM" Screen
Symptoms
CEM3 does not boot
LCD shows "ETC CEM" screen and stays there
No control of the system
Explanation of Issue
In most instances, either the CEM3 bootline has been corrupted and mostly erased, or the bootline fell back into a "testing" state
It is unknown what can cause this particular issue, but may be due to interruptions in the boot process, either through random resets, power issues, or problems during a firmware update. A failing backplane can also contribute to this issue
Another possible cause is a FLASH failure, though this is rare.
Fix/Solution
This issue requires special hardware and cannot be repaired in the field. Please contact ETC Technical Services to begin the RMA process
CEM3 Bootlooping or Resetting
Symptoms
CEM3 is rebooting/resetting/bootlooping on its own
CEM3 may or may not get to the main screen before resetting on its own
Explanation of Issue
There are several reasons why a CEM3 would be bootlooping
- Test switch (S3) failure
Most CEM3s stuck in a boot loop or resetting at random is caused by a failure of the test switch
- Firmware corruption
Uncommon, but can happen. A failed update and unintentional resets during the firmware update process can certainly cause this issue. May sometimes be related to a test switch failure
Fix/Solution
As none of these problems can be fixed in the field, please contact ETC Technical Services to begin the RMA process
CEM3 Booting But All Outputs Stuck On
Symptoms
CEM3 Boots
All outputs stuck on
Test switch S3 is in Normal position
Explanation of Issue
There are several reasons for this issue
The test switch at S3 may be physically open on one side or a trace for the reset line may be severed somewhere that is preventing correct operation
It is also possible that the output buffers have failed or the FPGA controlling the output buffers is not functioning correctly
Corrosion can contribute to all these possibilities
Fix/Solution
Please contact ETC Technical Services to begin the RMA process