Lexmark 1020 - Manual (Page 32)

3-7
4078-00X
Reset NVRAM to USA Defaults
This test resets the user defaults area of NVRAM to the USA factory
defaults. The page count and the error log do not change.
Note: Factory defaults are initially set to USA.
To run the test:
1. With the printer off, press and hold the Install Print
Cartridge button while turning the printer on:
2. After five seconds, release the button to begin the test.
A sheet of paper will feed and verify the defaults have been set by
printing “US”.