Before troubleshooting, do the following:
1 Perform the “Procedure before starting the 9yy service checks” on page 348.
2 Determine the operating system used when the error occurred. If possible, determine whether a
PostScript
TM
or PCL
TM
file
was sent to the printer when the error occurred. Ask the customer which
Lexmark Solutions applications are installed on the printer.
Action Yes No
Step 1
Perform a POR.
Does the error remain?
Go to step 2. The problem is
solved.
Step 2
a Write down the exact 900.xx error code that appears on the
display.
b Turn o the printer.
c Clear the print queues.
d Disconnect all communication cables, and then remove all
memory options.
e Remove any installed ISP.
f Reset the printer into the Diagnostics menu.
Does the problem remain?
Go to step 3. Go to step 6.
Step 3
Check all the cables on the controller board for proper connection.
Are the cables properly connected?
Go to step 5. Go to step 4.
Step 4
a Reconnect the cables.
b Reset the printer into the Diagnostics menu.
Does the problem remain?
Go to step 5. Go to step 6.
Step 5
a Replace the controller board. See “Controller board removal”
on page 424.
b Reset the printer.
Note: If a dierent error code displays, then go to the service
check for that error code.
Does the problem remain?
Go to step 31. The problem is
solved.
4064
Diagnostics and troubleshooting
350
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