Lexmark 4059-XXX - Manual (Page 51)

Diagnostic Information 2-24
4059-XXX
Power-On Self Test (POST)
When you turn the printer On, it performs a Power-On Self Test.
Check for correct POST functioning of the base printer by observing
the following:
1. The LED comes on.
2. The operator panel displays one and a half row of pels, then
clears.
3. Diamonds scroll across the display, then clear.
4. “Performing Self Test” appears on the display.
– The 2000 sheet high capacity option elevator tray moves to
the uppermost position if installed.
– The duplex option is checked if installed.
– The output expander option exit rollers turn if installed.
5. “Busy” appears on the display.
6. The fuser lamp turns on. The fuser takes longer to warm up
from a cold start than a warm start.
7. The main fan turns on.
8. The main drive motor turns on.
9. The developer drive assembly drives the developer shaft in the
toner cartridge.
10. The exit rollers turn.
11. The operator panel LED starts blinking.
12. Models 2420, 2450 2455 and 3455 only - The auxiliary fan turns
on and continues to run until the printer is powered off.
13. “Ready” appears on the display.