Chosen Solution
Where can I find a power cord for it and how much will it cost
These use the older power adapters from the laptops. It’s probably 90-120W; look for a label with the voltage (should be 19.5V) and get the amps. You’ll know for sure, with a calculator: V(Volts, 19.5 but verify to be sure)xA(amps)=W(Watts). Take the final number you got on your calculator, and find one that meets or exceeds the factory unit. The label is the BARE MINIMUM it needs. There is no special adapter for these. HP uses the same laptop power adapters on these (and the lying “desktops” with a non-expandable Mini-ITX board) as a cost cutting measure.