It pays to pay attention.
Danny Grantham posted an answer for this HP DeskJet 5150 InkJet Printer:
"Look at adapter, see what output is supposed to be- maybe 12 volts DC? Find a multimeter..."
Danny Grantham posted an answer for this Canon PIXMA iP3000 InkJet Photo Printer:
"Look at adapter, see what output is supposed to be- maybe 12 volts DC? Find a multimeter..."
Danny Grantham posted an answer for this Canon PIXMA iP3000 InkJet Photo Printer:
"Another upside down shaking fix on a Canon MP180! This was after I had taken it apart..."