Table 2-8 Heartbeat Led, Status - HP LASERJET ENTERPRISE M725dn Troubleshooting Manual

Table 2-8
LED color
Green
Yellow
Red
Off
Connectivity LED
If the connectivity LED is solid green, it indicates that the formatter assembly is correctly plugged in and
powered up.
TIP: If the connectivity LED is illuminated, the formatter is fully seated and the power is on. The pins
for the LED circuit in the formatter connector are recessed so that this LED will not illuminate unless the
formatter is fully seated.
HP Jetdirect LEDs
The embedded HP Jetdirect print server has two LEDs. The yellow LED indicates network activity, and
the green LED indicates the link status. A blinking yellow LED indicates network traffic. If the green LED
is off, a link has failed.
134 Chapter 2 Solve problems
Heartbeat LED, status
Description
Solid—During part of boot up initialization and Pre-boot menu
●
Slow blinking—During normal operation/sleep mode
●
Formatter is operating normally
◦
Firmware is operating normally
◦
Control panel is connected
◦
Fast blinking—Formatter cannot connect to the control panel
●
Check control panel connections
◦
Verify control panel functionality
◦
Solid—Formatter error or failure (initially red for one second during power on)
●
Serial peripheral interface (SPI) flash memory boot error
◦
Power on self test (formatter) failed
◦
Diagnostic (formatter) failed
◦
The power cable is disconnected, or the product power switch is in the off position.
Firmware or system freeze, re-boot the product, reload or upgrade the firmware
●
Check control panel for an error message
◦
Control panel failure or the product power switch is in the off position
◦
NOTE: This condition is not usually caused by a formatter failure. Turn the power off, and then
on again. If the error persists, perform a firmware upgrade.
ENWW