If your HP Printer power supply or your PC power supply is a switch-mode supply, you MAY be able to make the output adjustable if they have an adjustable switched-mode regulator. Open it up and look for numbers on the chip(s).
If your HP Printer power supply or your PC power supply is a switch-mode supply, you MAY be able to make the output adjustable if they have an adjustable switched-mode regulator. Open it up and look for numbers on the chip(s).