I recently purchased a blade cx and everything was going great till the other day. Everything is trimmed out, lipo charged fully, new batteries in the transmitter but when i give it full throttle it wont lift off the ground and spins to the left. The 4-in-1 unit will blink red and green (the manual says this is a crystal problem) Could this mean i need new crystals, or maybe a new lipo? I have never overcharged or discharged too much. Any thoughts on what is wrong? Thanks