I have a all in 1 desk top that I am needing a power supply for and have no money to spend on 1 so is there to dc power supplys that I can put together to get the 20v @8amps that are needed to power up the unit.
DO NOT ATTEMPT THIS. WAIT UNTIL YOU HAVE ENOUGH MONEY TO PURCHASE ONE. IMPROPER POWER REGULATION COULD DESTROY YOUR COMPUTER.
Google the make and model of your all in one, and it's possible that you could purchase a used power brick.