Lexmark CS720 Service Manual page 218

91x.xx (910.xx‑919.xx) Engine software service check
Actions
Step 1
a
Remove the controller board shield. See
shield removal" on page
b
Check the cables on the controller board for proper
connection.
Are the cables properly connected?
Step 2
Replace the controller board. See
page 357.
Does the problem remain?
Step 3
Reconnect the cables, and then reset the printer.
Does the problem remain?
950.xx NVRAM failure service check
Warning—Potential Damage: When replacing any of the following components, replace only one
component at a time or the printer will be rendered inoperable:
Replace the required component, bring the printer up in Diagnostics mode, and then verify that the problem is
fixed before performing a POR.
This error indicates a mismatch between the operator panel assembly and the system board.
Actions
Step 1
Verify if the control panel has been replaced.
Has the control panel been replaced?
Step 2
Replace the control panel with a new, and not previously installed,
UICC card. See "Upper control panel removal" on page
Does the problem remain?
Step 3
Verify if the controller board has been replaced.
Has the controller board been replaced?
"Controller board
356.
"Controller board removal" on
Diagnostic information
218
Yes
Go to step 2.
Contact the next
level of support.
Contact the next
level of support.
Yes
Go to step 2.
Go to step 3.
280.
Go to step 4.
5028
No
Go to step 3.
The problem is
solved.
The problem is
solved.
No
Go to step 3.
The problem is
solved.
Go to step 5.