Lexmark M410 Service Manual - Page 83

4045-XXX 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. DRAM Memory Test The purpose of this test is to check the validity of DRAM, both standard and optional. The test writes patterns of data to DRAM to verify that each bit in memory can be set and read correctly. To run the DRAM Memory Test: 1. Select DRAM Memory Test from the menu. - The power indicator blinks indicating the test is in progress. 2. Press Return/Stop to exit the test. P:###### represents the number of times the memory test has passed and finished successfully. Initially 000000 displays with the maximum pass count being 999,999. F:##### represents the of time the memory test has failed and finished with errors. Initially 00000 displays with the maximum fail count being 99,999. Once the maximum pass count or fail count is reached, the test is stopped, the power indicator is turned on solid, and the final results display. If the test fails, the message DRAM Error, displays for approximately three seconds and the failure count increases by 1. Diagnostic Aids 3-9