Can you let us know what happens when you try this:
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Turn off your unit.
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Open the lid.
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Using both hands, gently roll the laser arm to the front of the unit.
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There are 5 clips pictured below. Check each one to ensure it is closed. The clip should lie flat, and you shouldn’t be able to flip it in any direction.
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If any of the clips are open, ensure the cable is inserted straight into the clip and close the clip.
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If any of the cables are misaligned in the clip, take a photo of the clip and cable and send it to me so I can take a look before you proceed. Do not try to adjust or reseat the cable.
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Close the lid.
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Turn your unit back on and wait for it to calibrate.
Let me know how it goes!