HP LaserJet P4510 Service Manual - Page 257
Troubleshooting tools, Individual component diagnostics, LED diagnostics
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Troubleshooting tools Individual component diagnostics LED diagnostics LED, engine, and individual diagnostics can help identify and troubleshoot product problems. Understand lights on the formatter Three LEDs on the formatter indicate that the product is functioning correctly. 1 2 1 HP Jetdirect LEDs 2 Heartbeat LED 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. For link failures, check all of the network cable connections. For non-link errors, print a configuration page. The second page is the HP Jetdirect configuration page. Examine this page for any inconsistencies among the network settings. Heartbeat LED The heartbeat LED indicates that the formatter is functioning correctly. While the product is initializing after you turn it on, the LED blinks rapidly, and then turns off. When the product has finished the initialization sequence, the heartbeat LED pulses on and off. ENWW Troubleshooting tools 243
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