a friend have this problem... can someone help ?

Hi there. Thanks for notifying us about this issue, and we're sorry such is encountered. We recommend you advise your friend to send the drone back to DJI for a proper diagnosis. An Online Repair Application can be directly submitted, or contacting our Customer Support for more details about the process is an option, too. Please be informed that warranty service can be offered depending on the damage assessment result and the warranty status of the drone. Should you have further concerns, please reach back here at DJI Forum. Thank you, and have a nice day.