Here is a picture of the toy:
I removed the small motor that looks about the size of a CD spindle motor. It measured around 1-2 ohms across its terminals. When I hooked it up to my bench supply with the current limiter set to 0.5 amps, the overload kept tripping. I was able to remove the motor from its case and give the brushes a good cleaning. Now the motor works fine from my bench supply but in circuit, it's still not working. I traced the circuit back to two pairs of SMD transistors. They are very hard for me to see even with my magnifiers. I think one of them has a crack in it. The only writing on the first pair is :Y1 and the other pair is marked, :Y2 Any ideas what kind of transistors or other three-terminal devices these are?
Thanks for your reply.