Shops Square register

Product Name: Shops Square register
Beautiful condition, however, I cannot get to turn on all the time. I believe it is just shops 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. My loss your gain. I don't want to mess with it, and I can't return it.