Lexmark CX510de - Page 122

Actions Yes No
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 “Panel Test” on page 171.
Did all the pixels come on?
Go to step 2. Replace the operator
panel. See “Operator
panel removal (for
CX310 and CX410
models only)” on
page 283.
Step 2
Turn the printer off.
Remove the rear cover. See “Rear cover removal” on page 221.
Remove the operator panel. See “Operator panel removal (for CX310 and
CX410 models only)” on page 283.
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.
Go to step 3. Reinstall the cable.
CX310
CX410
Step 3
Replace the operator panel. See “Operator panel removal (for CX310 and
CX410 models only)” on page 283.
Is the operator panel still dim and unchanging?
Replace the controller
board. See “Controller
board removal” on
page 239.
Problem resolved.
For CX510 models:
7527
Diagnostic information
122