From: The Paper Peripheral
Journal of the Triangle ADAM Users
Obtain a wide blade screwdriver or similar metal tool. Place the blade so it touches both the metal circle and the small metal box behind it. While maintaining this contact turn on the printer. The print head should begin moving to the left. Maintain the contact until you must remove you hand to allow the print head to pass.
If all went well the printer should print out random characters, Turn
off the printer, then turn it back on and try it out, it should now work
properly. If it still whines turn off the printer and try again, If you
try this Please be extra careful, TAU can assume no responsibility for