One motor Not Spinning Properly

Hello,

I am using Flame 60A 12S ESC along with V505 260kv motor for my vtol. I am using Pixhawk orange cube flight controller. I was testing motors individually from the motor test tab in mission planner. Three motors are spinning at 6% throttle for 2 sec default but one motor isn’t spinning. The ESC was also giving no beep so, I unplugged rest of ESC and motors and plugged only this one with Flysky transmitter and receiver. I reversed signal wire too. On plugging in battery, the beep started and when I tried to move motor with throttle, it didn’t move properly and it Sounds like something is resisting it. What could be the issue here??

If the ESC doesn’t even give the normal startup beeps when on Pixhawk, but does beep on direct RX test yet the motor just twitches/grinds, that usually points to a bad motor phase (open winding, short, or bearing jam). Try swapping that ESC with another motor you know works — if the problem follows the ESC, it’s the ESC; if it stays with the motor, the motor’s likely damaged.

Now, when I check the motor with FlySky individually, it is spinning properly without any resistance, but it isn’t spinning on the Motor Test tab. Giving the same command denied by autopilot error.