Are the batteries aligned correctly in the toy? If one is even wrong it will give power but it's messing up the signals going to the servo more than likely, I do hope this helps, if I had a few more details of make/model of toy I may be able to assist you further.
Answers & Comments
Are the batteries aligned correctly in the toy? If one is even wrong it will give power but it's messing up the signals going to the servo more than likely, I do hope this helps, if I had a few more details of make/model of toy I may be able to assist you further.
Regards Jem