is it dead :( ?

[shoebox-airbrushing]

Hi... i used to run 12th circuit and had a losi excelorin in it with a hacker 10.5 motor... now, everything was wired in right... but for some reason the speedo went booooommmm and is now long gone... but the motor is sat hare ..
Ive checked the rotor + winds and nothing SEEMS to be dead... but it feels a bit gritty... and i have no way of testing it.... any thoughts ??

Cheers
Rich