What you need is the transformer. 7410.602 is the correct one that came with 6100. These are no longer produced, however we have 2 left, they are $86.66. However we have an overstock of 6200.800 which is now the factory authorized replacement until these are also out of stock. We are clearing these out at $60. The only difference is the 7410.602 is a 60W transformer and the 6200.800 is 80W, both are 19V. It changes nothing about how the pump performs, it just has a higher capacity, the 6100 only uses 45W.