Lexmark 7300 Series, Service Manual, Page: 28 / 88

4418-X6X
2-8
Service Manual
POST symptom table
120F Printhead
Select Installed printhead ID,
print command
printhead ID, or loaded
printhead records do
not agree. Replace the print
cartridge.
121A Loop Timeout
Error Error detected that a
while loop or similar
loop
timed out before
the event it was waiting
on finished.
Unplug the
All-In-One; wait a few
seconds, then plug
the All-In-One back
in, and turn the power
on. If the error
remains, replace the
system board.
121B NVRAM
Control Section
Corrupted The Control Section of
NVRAM is corrupted. Unplug the
All-In-One; wait a few
seconds, then plug
the All-In-One back
in, and turn the power
on. If the error
remains, replace the
system board.
121C Image Pipeline
Error An error was detected
in the image pipeline. Unplug the
All-In-One; wait a few
seconds, then plug
the All-In-One back
in, and turn the power
on. If the error
remains, replace the
system board.
Symptom Action
Power, Copy, or
Scan lights do
not come on;
motors do not
operate. Go to the “Power service check” on page 2-18 . If okay,
go to “Control panel problems” on page 2-10 .
The paper feed
gears do not
turn. Go to the “Paper feed service check” on page 2-16 .
Code Name Description Action