Square order register

Product Name: Square order register
Beautiful condition, however, I cannot get to turn on all the time. I believe it is just a faulty wire for the power supply and I ended up buying another/ different terminal and can't return this one and don't want to buy another cord just to test. My loss is your gain if you can figure it out. There is no damage to this. Again order. My loss your gain. I don't want to mess with it, and I can't return it.