Estas seguro que calibrastes bien el mando? Yo probaria de nuevo.

que modelo de phantom tienes,
la solucion esta aqui por lo que se ve funciona

Motors Start failure caused by TX stick(s) mid point error too big
If the TX stick(s) mid point error is too big, Motors Start will fail when you execute the Combination Stick Commands (CSC) and lead to the aircraft will not takeoff.. And the LED will blink Red four times per second continually to warn you.
TX stick(s) mid point error too big can be caused by the following reasons:
(1) There is TX stick (except the throttle stick) not at center when power on the autopilot system.
(2) The TX sticks has been trimmed, which leads to the large deviation of mid point. For example, the SUB-TRIM has been adjusted for Futaba transmitter.
(3) The TX stick(s) travel has larger asymmetry.
For the reason (1), please put all TX sticks at the mid point, and then power cycle the autopilot system to re-record the mid point. If the problem continues, that can be caused by the reason (2) or reason (3), you need to adjust the output range of your TX, and then use the Assistant Software to redo the TX calibration. Please carry out the following procedures.
(1) Connect to the Assistant software, click Basic-> R/C-> Command Sticks Calibration, and push all TX sticks throughout their complete travel range to see if any stick cannot reach its largest position.
(2) Adjust the largest travel of TX stick until the cursor on the Assistant software can reach both end positions, according to your TX manual.
(3) Power cycle the autopilot system, note that power cycle is required.
(4) Redo the TX calibration according to the Assistant software.

prueba la calibración manual,síguelo paso por paso si no se te da bien el ingles te echo una mano,esto hay que realizarlo solo con el mando sin conectarlo a nada ni encender el repetidor wifi, solo el mando
si no te va probamos otras cosas para descartar fallo mecanico:

1. Set the switch S2 at the OFF position, and the switch S1 at the GPS position
2. Push the Throttle stick to the top position, and push the Pitch stick to the top position. Keep the Pitch stick at the top position manually since it can return to the central position when released.
3. Turn on the Power Switch of the transmitter, you should hear the indicator sound of “Di—Di Di” from the transmitter repeatedly. Toggle the switch S2 to the CL position, you should hear an indicator sound of “Di” from the transmitter, in this case, the transmitter has entered the calibration mode. (During this period, the Throttle stick and the Pitch stick must be kept at the top position all the time.)
4. Release the Pitch stick and pull the Throttle stick to the central position. Toggle the switch S1 to the ATTI position; you should hear an indicator sound of “Di” from the transmitter. Then move all of the sticks throughout their complete range several times. After this, put the Throttle stick to the bottom position, and toggle the switch S2 to the HL position, you should hear an indicator sound of “Di” from the transmitter, in this case, the transmitter has been calibrated successfully.

despues recalibra con el pc rpimero en el rc y despues en el assistant

nota: por defecto deberías tener el throttle en el stick izquierdo (mode 2) y el pitch en el derecho.

Jose escribió:

Nacho muchas gracias por tu interés de verdad te estoy muy agradecido. En cuanto acueste a las niñas lo hago. De verdad muy agradecido

nada hombre a mi también me gusta que me echen una mano cuando ando desesperao por algo,ademas es un error puñetero y muy comun por desgracia.
creo que tienes mi whatsapp si quieres dame un toque despues y lo vemos juntos,yo tambien tengo que acostar a un par de niñas 😉

:aplausos: