add first power-on note

Author: gslloyd

_milestones/m1.md

@@ -96,6 +96,8 @@ View the [Laser Tag Kit Assembly Video](https://youtu.be/Nahy_cQTVWU) for helpfu
 
 Your kit does not contain the LiPo battery for safety reasons. When you are ready to insert your battery, you can obtain one from the instructor or a TA. It is included in the price of your kit.
 
+Your main digital board comes unprogrammed. If you power on your unit at this stage, only the red power indicator near the power switch should illuminate. In some cases, depending on the design of your analog board, your power LED may illuminate. The next step is necessary to verify the functionality of your assembled kit.
+
 ### Verify Functionality
 
 Program your laser tag unit with a diagnostic program by following these steps: