PRESONUS StudioLive CS18AI Visual Quickstart Manual page 8

PLEASE NOTE: Once you have power-cycled the mixer after the initial firmware update step, it may need to finish
some final components of the firmware update. If this is the case, you will see the Channel LEDs on the front of the
mixer illuminate amber from left to right as this is done. This can take up to 10 minutes to complete so please be
patient. Once the final portion of the update is complete, all the Channel LEDs will illuminate green. When you see this,
power cycle the mixer. This process may occur several times depending on what firmware version you are upgrading
from and to. If your mixer does not do this, do not be alarmed as it may not be necessary for this particular update.
10. Restart UC Surface, revisit the Device Settings Tab in the Settings Menu and observe
the firmware version shown. The last four digits of the firmware version reported
there should match the version of the files you downloaded for your mixer.
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9. The update process will take about a minute to complete. When finished
you will be prompted to power-cycle the mixer.