Lexmark 4227-X00 - Manual (Page 42)

Diagnostic Information 2-19
4227-X00
Operator Panel Service Check
Note: Press any button except Start/Stop, Load/Unload, or
FormFeed. If “Operator Panel Disabled” is displayed, unlock the
operator panel by powering up with the Micro
 and Micro
keys
pressed. Use the same procedure to re-lock the panel after service
is complete.
FRU Action
1 Operator Panel If there is a 631 Display RAM Error, replace the
operator panel.
If there is a 63B Key Scan Error, one or more
buttons are being detected as pressed during
power-up.
Replace the operator panel.
2 Printer Cable
Operator Panel During power-up, all LEDs and all LCD pels
should turn on briefly.
Enter the Service Menu and perform the
Button Test. If there are missing or extra pels
displayed, or if any of these tests fail, check the
condition and continuity of the operator panel
cable.
Replace the cable or the operator panel.
3 Cover Switch If Cover Open is displayed, check the cover
switch.
Jumper the cover switch connector on the
operator panel. If Cover Open is displayed,
check the condition and continuity of the
operator panel cable. Replace the cable or the
operator panel.
4 Main Logic Board If the symptom has not changed, replace the
main logic board.