If you crashed the drone you need to find out what motors were affected. That annoying beep, beep, beep at start up is a sound made by the motor. Just because it says error on all four esc motors doesn't mean all or bad. At start up it cycle checks in this order always.. 4,2,3,1. I had a bad esc for motor 4 and 1 right side. I knew the esc was only having a problem with motor 1, is the beeping and flashing red led only on that arm of drone. Since motor 4 is the first motor tested on the bad ear at start up failure for all esc occurs. Try to track down which motor is beeping, flashing red, or twitching as I call it. Dji p4 motors rarely go bad but I replace them them if I crack open the case, 20 dollars a motor not too bad and a rest or assurance. You can do it yourself if you have some knowledge or send it in. They will replace the esc board and possibly the motors. There's you tube videos on opening the case and they are very knowledgeable. Gotta have a good soldering gun, solder and patience. You working on a small board and it's easy to melt the capacitor with the side of the gun. Connections to solder are close together. The power and ground wire are a ***** if you don't have a board holder and even then. Splicing motor wires to save time? There's alot of juice going to those motors, rather have a solid connection. Hope this helps... Also Blade strikes with ground, tree, Bush, finger, dog, cat, ect while motors are running=equals blown MOSFET circuit aka bad ESC board.... Fix this problem DJI