No Contact with PH2.1 - GPS Blinking red

Hardware Pixhawk 2
,
1

See video here: https://www.dropbox.com/s/iz2ls030u4qbhs7/PH2.1GPSBLINKING.mp4?dl=0

this happened while trying to connect PH2.1 to RPI3

2

Try to connect now, no heartbeat.

root@apsync:/home/pi# mavproxy.py --master=/dev/ttyS0 --baudrate 57600 --aircraft MyCopter
Connect /dev/ttyS0 source_system=255
no script MyCopter/mavinit.scr
Log Directory: MyCopter/logs/2017-12-28/flight3
Telemetry log: MyCopter/logs/2017-12-28/flight3/flight.tlog
MAV> Waiting for heartbeat from /dev/ttyS0