Lexmark CX310n Service Manual page 122

Actions
Step 1
Enter the Diagnostics Menu (turn the printer off, press and hold 3 and 6,
turn the printer on, and then release the buttons when the installed
memory and processor speed displays).
Perform the Panel Test. See
Did all the pixels come on?
Step 2
Turn the printer off.
Remove the rear cover. See
Remove the operator panel. See
CX410 models only)" on page
Is the operator panel cable properly installed at JLCD1 on the controller
board and the operator panel assembly?
Note: JLCD1 is the ribbon cable connector on the right side facing the
controller board.
Step 3
Replace the operator panel. See
CX410 models only)" on page
Is the operator panel still dim and unchanging?
For CX510 models:
"Panel Test" on page 171.
"Rear cover removal" on page
"Operator panel removal (for CX310 and
283.
"Operator panel removal (for CX310 and
283.
Diagnostic information
Yes
Go to step 2.
Go to step 3.
CX310
221.
CX410
Replace the controller
board. See
board removal" on
page 239.
122
No
Replace the operator
panel. See "Operator
panel removal (for
CX310 and CX410
models only)" on
page 283.
Reinstall the cable.
Problem resolved.
"Controller
7527