<p> WHAT TO DO IF YOUR MWC BOARD DOES NOT ARM</p><p>If your board does not arm with full down throttle and full right yaw held in place for several seconds, you might like consider the following.</p><p>Prelim stuff - Clear your EEPROM and upload a fresh sketch – uncomment only frame and sensor to make it simple for now.</p><p>There are some basic things that need to be checked or considered for setting up making sure the correct working environment for the radio, software, GUI and connections.</p><p> Radio in heli mode and/or has mixes enabled. Use airplane mode and clear all mixes.  Uncalibrated radio sticks. The radio neutral points (1500 ..) have not been properly established. Calibrate your radio sticks to center properly.  Incorrect RX connection to the board - polarity reversed or floating ground,  Rx not properly bound. Outer rail ground. Inner rail signal.  USB cord / port defective. Try using another cord or USB port.  Silabs driver not installed properly. Download from the Silabs site and install.  Incorrect COM port/speed used for GUI. Look up the correct COM in Device Manager. Normal baud rate in 115200 – unless it was changed.  Wrong stick direction on the radio - full right yaw on the radio translates to full left yaw. Full down throttle translates to full up in the GUI ( it happens ...) . Go to radio set up and reverse the travel accordingly.</p><p>Conditions that will prevent arming (NO ARM factors) and what to do/check. a) Accel is not calibrated. The first thing you should do is calibrate your Accel – since you are using WinGUI – hit the Accel Calibrate button. You will have to do a more accurate calibration later. b) Full Down Throttle is above 1100 in the GUI. Go to the end point adjustment menu of your radio and push down throttle (some radios, lower the % from 100 to say 95…) and test. c) Full Right Yaw is below 1900 in the GUI. Go to the end point adjustment of your radio and push up yaw to over 100) and test. d) Full Down Throttle / Full Right Yaw is held for less than one second - Sticks should be held steady until the arm LED's - RED beside the USB plug - lights up. </p><p>Hopefully your board arms by now….. </p>