Lexmark MX71X - Blank Display, Five Beeps Service Check

Action Yes No
Step 4
Check the AC line voltage to the machine. The voltage should be within
the following limits:
• for 110 machines—100 to 127 V AC
• for 220 V machines—200 to 240 V AC
Is the voltage within the limits?
Go to step 5. Try a different outlet.
Step 5
Check the voltages on the LVPS card.
• +5V at pins 17 and 19
• +24V at pins 11, 13, and 15
Are the voltages correct?
Contact the next
highest level of
support.
Replace the LVPS. Go to
“LVPS removal” on
page 445.
Blank display, five beeps service check
Action Yes No
Step 1
POR the printer.
Does the problem remain?
Go to step 2. The problem is solved.
Step 2
Make sure that the control panel flat flexible cable is properly connected
to the controller board.
Does the problem remain?
Go to step 3. The problem is solved.
Step 3
Make sure that the control panel flat flexible cable is properly connected
to the control panel board.
Does the problem remain?
Go to step 4. The problem is solved.
Step 4
Replace the control panel.
Does the problem remain?
Contact the next level
of support.
The problem is solved.
7463
Diagnostic information
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