Just replaced motors (2312s) and esc's (v 2.1) on my P2 non-vision, now is very erratic at power up. One time it will flash R, Y, G, then nothing and rc wont do anything...next time I turn it on, get RYG, then flashing yellow but compass wont calibrate...then a few times it went fine and P2 started. Everything updated and IMU calibrated. Rechecked all connections..all looks good. Bird was crashed but it started and ran good before I changed the motors and esc's. ???