First off, I own this R15-500. I am geting steady reboots, I have read the forums and understand the HDD and power supplies fail. My question, I have a used R-15 300 from my neighbor (also owned, switched to Dish) are the power supplies the same in the 300 as the 500, and will swapping a used HDD from the 300 work in my 500? Normally I would dive in and check myself, but I am dealing with some back issues. Thanks in advance.