Hi please forgive me before I come across a numpty

, This may be easy to sort out
iv bought a roller tm2 v1 that came with a free Turnigy Trackstar GenII 120a speedo and motor, as wasn't sure if was working
now I am new to all this so a friend has put the motor on his esc and it works fine
now the speedo red light comes on my hand set has been bind to the receiver and I have full motion in regards to the steering
with out the hand set switched on the I connect the battery, speedo comes on solid re light with a one bleep / noise
Soon as I switch my handset on the red light on the speedo keeps flashing and beeping, I if I put on the throttle it does nothing just keeps beeping until I unplug
has or does anyone know what I need to do or could this be broken ?

I just want to buy a new one if this just needs setting up
thanks again steve