Xerox DocuPrint P12 User Manual page 71

The following is a table indicating the types of hardware problem you
are experiencing through the LEDs' responses when you hold down the
control panel button during the Hardware Malfunction status.
Online Error
Double
blink
Double
blink
Blink
Blink
The LED responses are defined as follows:
Response
Blink
Double-blink
Paper Manual Hardware Malfunction
Feed
Engine Fatal Error (Fuser
malfunction)
Double Engine Fatal Error (Laser
blink scanner malfunction)
Double Engine Fatal Error (Fan
blink malfunction)
Engine Fatal Error (Non-
volatile RAM in the printer
engine)
Controller Fatal Error
(Controller malfunction)
Controller Fatal Error
(Extension RAM)
Blink Controller Fatal Error
(Network card malfunction
(for Xerox DocuPrint P12
Network interface card))
Explanation
0.5 second on / 0.5 second off, repeat
0.25 second on / 0.25 second off / 0.25
second on / 1 second off, repeat
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Control Panel 61