I had a look at the Owners Manual and in section 2.2. it says:
"13. Continue to hold the Home button until only the Channel 1 Meter is illuminated. This is your indication that the firmware update has begun. 14. The Meters will continue to illuminate updating the progress of the firmware update. When all 22 meters are fully lit, the update is complete. Note: This process can take up to 10 minutes. Do not power off your CS18AI until all 22 meters are illuminated."
Try the firmware update again. It may bring your CS18AI back to life.