Blank Display, Five Beeps Service Check - Lexmark MX71x Service Manual

Action
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?
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?

Blank display, five beeps service check

Action
Step 1
POR the printer.
Does the problem remain?
Step 2
Make sure that the control panel flat flexible cable is properly connected
to the controller board.
Does the problem remain?
Step 3
Make sure that the control panel flat flexible cable is properly connected
to the control panel board.
Does the problem remain?
Step 4
Replace the control panel.
Does the problem remain?
Yes
Go to step 5.
Contact the next
highest level of
support.
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Contact the next level
of support.
Diagnostic information
275
7463
No
Try a different outlet.
Replace the LVPS. Go to
"LVPS removal" on
page 445.
No
The problem is solved.
The problem is solved.
The problem is solved.
The problem is solved.