HP Enterprise Flow N9120 L2683B201 Installation troubleshooting, Check that the scanner has power

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Installation troubleshooting

If the scanner does not work after installation or if the scanner has stopped working correctly, you might see a message on the computer screen that is similar to one of the following:

The scanner could not be initialized.

The scanner could not be found.

An internal error has occurred.

The computer cannot communicate with the scanner.

To fix the problem, check the scanner cables and software as described in the following sections:

Check that the scanner has power

Check the USB connection

Uninstall and then reinstall the HP Scanjet utilities

Check that the scanner has power

The power cable is connected between the scanner and a power outlet.

Ensure that the power cable is securely connected between the scanner and a live electrical outlet.

If the power cable is connected to a surge protector, ensure that the surge protector is plugged into an outlet and turned on.

Ensure that the Power switch on the right side of the scanner is in the on position.

If the problem persists after verifying the above items, try the following:

1.Press the Power switch to the off position, and then disconnect the power cable from the scanner.

2.Wait 30 seconds.

3.Reconnect the power cable to the scanner, and then press the Power switch to the on position. After 30 seconds, the Power LED is lit with a steady green light and the Attention LED is off.

Check the USB connection

Check the physical connection to the scanner.

Use the cable that was included with the scanner. Another USB cable might not be compatible with the scanner.

Ensure that the USB cable is securely connected between the scanner and the computer or USB hub. The trident icon on the USB cable faces up when the cable is properly connected to the scanner.

If the problem persists after verifying the above items, try the following:

1.Do one of the following tasks depending on how the scanner is connected to the computer:

If the USB cable is connected to a USB hub or a docking station for a laptop, disconnect the USB cable from the USB hub or the docking station, and then connect the USB cable directly to the computer.

If the USB cable is directly connected to the computer, plug it into another USB port on the computer.

Remove all other USB devices from the computer except for the keyboard and the mouse.

2.Press the Power switch to the off position, wait 30 seconds, and then press the Power switch to the on position.

Installation troubleshooting

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Contents HP Scanjet Enterprise N9120/Flow N9120 Trademark credits Copyright and licenseContents Product care and support Use the scanner Scanner overviewScanner front panel buttons Icon Button name Description Copy Scanner lamp settingUse the automatic document feeder Load original documentsHow to load documents Load original documents Load an original on the scanner glass How to scan Associate a quick start button with scanning softwareScan from scanning software How to copy Scan from HP Smart Document Scan SoftwareScan from ISIS- or TWAIN-compliant scanning software Create profiles Useful scanner featuresWork with HP Smart Document Scan Software profiles View profilesAutomatically rotate scanned pages Scan extra long documentsFilter out color from a document color dropout Use scanner hardware compression for faster scans Disable Misfeed Multipick DetectionSet up and use the imprinter Install or replace a print cartridge in the imprinterScan without reviewing Set up and use the imprinter Imprinter tab Cartridge Status section, click Record ReplacementPosition the imprinter Test the imprinterCartridge Status section, click Test Imprinter Clean the imprinterCartridge Status section, click Clean Imprinter Use the imprinterCare and maintenance Order maintenance and scanning suppliesClean the automatic document feeder Clean the automatic document feeder Chapter Clean the scanner fan filters Clean the scanner glassReplace the feed roller and separation pad HP Scanner Tools Utility scanner maintenance informationMaintenance tab ReplacementHP Scanner Tools Utility scanner maintenance information Scanner LEDs TroubleshootingInstallation troubleshooting Check that the scanner has powerCheck the USB connection Scanner lamp stays on Scanner operation problemsUninstall and then reinstall the HP Scanjet utilities Scanner will not turn onScanned pages are out of order at the scan destination Scanner does not scan right awayScanner scans only one side of a double-sided Scanned image is fuzzyScanned images contain streaks or scratches Optimizing scanning and task speedsImage is completely black or completely white Scanned images are not straightImprinter is not printing or the print quality is poor Imprinter tab, and then click Clean ImprinterVertical white stripes appear on the printed Scan files are too largeButtons do not work An unexpected program opens when a button is pressedWrong profile is used when the Scan button is pressed Scanner buttons are not working correctlyClear a jam from the automatic document feeder Automatic document feeder problemsOpen automatically, gently pry it open Bottom of the scanned image is cut off Automatic document feeder does not feed paperAdditional troubleshooting information Getting assistance Maintenance, troubleshooting, and supportPost-warranty period Extending or upgrading your warranty Product care and supportRegulatory information and product specifications Materials disposal Hewlett-Packard limited warranty statementChapter Control of the scanner buttons AccessibilityAccessibility features LED ReaderChapter Accessibility