Hi guys,I need help,my eachine f3 won't arm and it won't connect to betaflight. It did connect to betaflight at first,and everything went fine,until I soldered third brushed motor.I soldered two motors first and then connected my FC to lipo,I was able to arm it and even able to spin the motors for a while.After installing the third motor,f3 won't arm,all I get is a solid red light on my FC. I was supposed to get three flashes of blue light and then solid red.What should I do?,please help!!!!!.