Hello if some one can help me i have a phantom 2 vision and when i start it it blinks threw the startup then it goes straight to redl light and it stays there can any body help i heard that it can be the cennector for the battery i checked them and ther making continuity i cant  even calibrate the phantom it calibrates the first step then when i go to the next step it goes straight to red please help.

Hi, please try to clean the connectors of the battery and the drone.And was the firmware up to date?
If still no improvement , I'd suggest you to get in touch with our tech support at support.us@dji.com and send it in for evaluation.