Diagnostic/Boot mode stuck on after firmware update

Symptom:
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There is a known issue where the boot light may be stuck on after updating to the 15.12 firmware. This is due to an internal jumper that gets recognized as being in the diagnostics position with the new firmware that wasn't seen before. The diagnostics menu will be seen when booting up in terminal mode.

Solution:
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To disable this, open up the cover on the unit and change the jumper from the right to the left side, as looking at the unit from the front.