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Electronic Theatre Controls Inc

Congo Sr - Will Not Boot


The information in this post is provided to assist in troubleshooting. Perform work at your own risk. ENSURE ANY POWER FROM DEVICES HAS BEEN DISCONNECTED BEFORE SERVICING ANY EQUIPMENT. If you do not feel comfortable performing the work, please contact us or your local service center. Be aware that ETC and its Affiliates are not responsible for any damage or injury caused by service of our products by anyone other than us or our authorized service providers, and such damage is excluded from the product’s warranty.


Congo Sr. console will not boot.  Sometimes will not power on at all.

Description/Explanation of Issue

CMOS has likely has lost settings, often due to a dead coin cell battery.  When the battery dies, the CMOS settings go back to default, but the Congo Sr has special settings.


  1. Try pressing the Reset button at the back of the console while console has power
    1. If the console has a rocker power switch, the switch must be turned on.
    2. If the console has a momentary power switch, try pressing the momentary and Reset independently or both at the same time. 
  2. Press F2 as the console powers on until the console enters BIOS settings menu.
  3. Correct the BIOS settings according to this document - Congo Bios Settings - 1 page.pdf
    1. Pay special attention to the Power Control Configuration. 
      1. If the console has a rocker power switch, After Power Failure = Stay OFF
      2. If the console has a momentary power switch, After Power Failure = Stay ON
  4. Press F10 to save settings, and let the console reboot itself.


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