HP P2015 Service Manual - Page 149

Table 7-1 Basic problem solving (continued) The printer is on, but the control panel lights indicate that the printer is not in the "ready" state. The printer is not "ready." Cause Solution The printer has an internal error that was detected during the power-on self-test sequence. Consult the list of control panel light patterns to identify and correct the error. The printer turns on, the motor rotates, and the control panel indicates the "ready" state, but the printer does not print. The printer does not print. Cause Solution A printer component is defective. Perform an engine test to verify print-engine components. 1. Press the engine test switch to print an engine test. 2. If the engine test page does not print, check all of the connectors on the ECU and reconnect any cables that are connected incorrectly. 3. If, after checking the connectors, the error persists, replace the ECU. The formatter is defective. Press the Go button to print a Demo page. If the Demo page does not print, replace the formatter. The printer prints the engine test and the Demo page, but does not print jobs sent from a computer. The printer does not print from a computer. Cause Solution The cable is not connected correctly. An incorrect printer driver is selected. Reconnect the cable. Select the correct printer driver. The printer driver is not installed correctly. Other devices are connected to the printer (for example, through a switch or hub) that are interfering with the computer-printer communications. There is a computer-port communications problem. Uninstall and then reinstall the printer software. Make sure that you use the correct procedure and port setting. Disconnect the other devices, switches, or hubs. Reset the computer port settings (see the computer user guide for more information). The formatter is defective. Replace the formatter. ENWW Basic problem solving 139