Lexmark 4059-XXX - Manual (Page 142)

3-9 4059 Service Manual
4059-XXX
Hardware Tests
The following Hardware Tests can be selected from this menu:
LCD Test
Button Test
DRAM Memory Test
ROM Memory Test
Parallel Wrap (if available)
Serial Wrap (if available)
Serial 1 Wrap (if available)
Serial 3 Wrap (if available)
LCD Test
To run the LCD Test:
1. Select LCD Test from the Diagnostic menu.
– The LCD test continually executes the LCD display test.
2. Press Return/Stop to cancel the test.
Button Test
To run the Button Test:
1. Select Button Test from the Diagnostic menu.
– With no buttons pressed several OP (Open) appear on the
display.
2. Press each button one at a time and a CL (Closed) displays in
place of an OP. The proper operation of each button can be
checked.
3. Press Return/Stop to cancel the test.