Table 2-10 Heartbeat LED, product operational (continued)
LED color Description
◦
Check control panel connections
◦
Verify control panel functionality
Red
●
Formatter error or failure
◦
Serial peripheral interface (SPI) ash memory boot error
◦
Power on self test (formatter) failed
◦
Diagnostic (formatter) failed
O TIP: The heartbeat LED is o if the power cable is disconnected, the product power switch is in the o
position, or the product is in Sleep Mode.
●
Firmware or system freeze
◦
Check control panel for an error message
◦
Control panel failure
NOTE: This condition is not usually caused by a formatter failure. Turn the power o, and then on
again. If the error persists, perform a rmware upgrade.
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 traic. If the green LED is o, a
link has failed.
For link failures, check all the network cable connections. In addition, try to manually congure the link
settings on the embedded print server by using the printer control-panel menus.
1. From the Home screen on the printer control panel, scroll to and touch the Administration button.
2. Open the following menus:
●
Network Settings
●
Embedded Jetdirect Menu
●
Link Speed
3. Select the appropriate link speed, and then touch the OK button.
Tools for troubleshooting: Engine diagnostics
The printer contains extensive internal engine diagnostics that help in troubleshooting print quality, paper
path, noise, assembly, and timing issues.
Engine test button
To verify that the printer engine is functioning, print an engine test page. Use a small pointed object to
depress the test-page switch located on the rear of the printer. The test page should have a series of lines
that are parallel to the short end of the page. The test page can use only Tray 2 as the paper source, so make
sure that paper is loaded in Tray 2.
ENWW Tools for troubleshooting 143
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