Robot doesn't remain turning on

Hi, I was trying to pair the robot, however the light on the robot doesn’t remain on through out. It seems that something is loose and I have press both sides of the wheels together to get the light on again, but it only lasts a while. Please assist.

You probably accidentally reset the board pairing when you held the yellow button for too long. So now you have to reset the robot pairing by pressing this button with a screwdriver or pen. Make sure the green light blinks. Then try pairing them from scratch"