Lexmark Optra C710 Service Manual - Page 208
Hardware Tests, LCD Test, Button Test
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5016-001 Hardware Tests The following Hardware Tests can be selected from this menu: LCD Test DRAM Memory Test Parallel Wrap (if available) Serial 1 Wrap (if available) Serial 3 Wrap (if available) Button Test ROM Memory Test Serial Wrap (if available) Serial 2 Wrap (if available) LCD Test 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. 3-10 Service Manual