HP LaserJet Enterprise 500 Service Manual - Page 279
Troubleshooting process, Determine the problem source
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Troubleshooting process Determine the problem source When the product malfunctions or encounters an unexpected situation, the product control panel alerts you to the situation. This section contains a pre-troubleshooting checklist to filter out many possible causes of the problem. A troubleshooting flowchart helps you diagnose the root cause of the problem. The remainder of this chapter provides steps for correcting problems. ● Use the troubleshooting flowchart to pinpoint the root cause of hardware malfunctions. The flowchart guides you to the section of this chapter that contains steps for correcting the malfunction. Before beginning any troubleshooting procedure, check the following issues: ● Are supply items within their rated life? ● Does the configuration page reveal any configuration errors? NOTE: The customer is responsible for checking supplies and for using supplies that are in good condition. Troubleshooting flowchart This flowchart highlights the general processes that you can follow to quickly isolate and solve product hardware problems. Each row depicts a major troubleshooting step. A "yes" answer to a question allows you to proceed to the next major step. A "no" answer indicates that more testing is needed. Go to the appropriate section in this chapter, and follow the instructions there. After completing the instructions, go to the next major step in this troubleshooting flowchart. Table 3-1 Troubleshooting flowchart 1 Power on Is the product on and does a readable message display? Yes No Follow the power-on troubleshooting checks. See Power subsystem on page 244. After the control panel display is functional, see step 2. 2 Control panel messages Does the message Ready display on the control panel? Yes No After the errors have been corrected, go to step 3. 3 Event log Open the Troubleshooting menu and print an event log to see the history of errors with this product. Does the event log print? Yes No If the event log does not print, check for error messages. If paper jams inside the product, see the jams section of the product service manual. If error messages display on the control panel when you try to print an event log, see the control panel message section of the service manual. After successfully printing and evaluating the event log, see step 4. ENWW Troubleshooting process 243