Lexmark MB2236 - No Display Service Check

Action Yes No
Step 2
Replace the top cover. See
“Top cover removal” on page 248.
Does the problem remain?
Go to step 3. The problem is
solved.
Step 3
a Reseat all the cables on the controller board.
b Check if the controller board LED lights up.
c Check the controller board for proper installation and damage.
Is the controller board properly installed and free of damage?
Contact the next
level of support.
Go to step 4.
Step 4
Replace the controller board. See
“Controller board removal” on
page 228.
Does the problem remain?
Contact the next
level of support.
The problem is
solved.
No display service check
Action Yes No
Step 1
a Reseat all the cables on the controller board.
b Check if the controller board LED lights up when the power is
on.
Does the controller board LED light up?
Go to step 2. Go to step 4.
Step 2
a Check the control panel for proper installation and damage.
b Check the control panel cable for proper installation and
damage.
Is the control panel properly installed and free of damage?
Go to step 4. Go to step 3.
Step 3
Replace the control panel. See
“Control panel removal” on
page 238.
Does the problem remain?
Go to step 4. The problem is
solved.
Step 4
a Reseat all the cables on the controller board.
b Check if the controller board LED lights up.
c Check the controller board for proper installation and damage.
Is the controller board properly installed and free of damage?
Contact the next
level of support.
Go to step 5.
3400-48x
Diagnostics and troubleshooting
185