Lexmark C734 - POST (Power-On Self Test)-One Sensor Not Connected Error Service Check

Diagnostic information 2-101
5026
920.12—POST (power-on self test)—One sensor not connected error service check
Step Questions / actions Yes No
1 Remove the left cover. See “Left cover
removal” on page 4-21. Check all the toner
level sensor cables connected to the rear of
the HVPS.
Are any of the cables damaged?
Replace the damaged
sensor. See “Toner level
sensor removal” on
page 4-146.
Go to step 2.
2
Disconnect one of the toner level sensors and
POR the printer.
Does the 920.12 error occur again?
Replace the toner level
sensor. See “Toner level
sensor removal” on
page 4-146.
Repeat the step for the
other toner level sensors.
After all the sensors are
tested without the 920.12
recurring, the problem is
resolved.