HP N8400 manual Scanner initialization or hardware problems, Scanner does not start

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Scanner Error Message

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Recovery Process

Follow these steps to resolve the error:

1.Check the USB connection between the scanner and the computer. For more help, see Check the cables.

2.Verify that the scanner is correctly enumerated on the host. If not, try uninstalling and then reinstalling the software. For more information, see the HP Scanjet N8400 series Setup and Support Guide.

3.If the problem persists, contact HP Support. For more information, see Contact HP Support.

Press the Power Save button to turn the scanner off, and then turn the scanner on again by pressing one of the front panel buttons. If the message is still displayed, contact HP Support. For more information, see Contact HP Support.

Press the Power Save button to turn the scanner off, and then turn the scanner on again by pressing one of the front panel buttons. If the message is still displayed, contact HP Support. For more information, see Contact HP Support.

Press the Power Save button to turn the scanner off, and then turn the scanner on again by pressing one of the front panel buttons. If the message is still displayed, contact HP Support. For more information, see Contact HP Support.

Scanner initialization or hardware problems

•Scanner does not start

•Scanner has stopped working correctly

Scanner does not start

If you receive an error message similar to “Scanner initialization failed” or “Scanner not found” when trying to use the scanner, follow these steps:

1.Close the scanning software, if it is open.

2.Disconnect the USB cable that connects the scanner to the computer.

3.Press the Power switch to the off position.

4.Shut down the computer operating system, turn the computer off, wait 60 seconds, and then turn the computer back on.

5.Press the Power switch to the on position.

6.Reconnect the USB cable that connects the computer and the scanner, making sure that the USB cable is connected to the back of the scanner correctly.

After 30 seconds, the scanner display should show Ready. If the display does not show Ready, see the printed Setup and Support guide that came with the scanner.

Scanner initialization or hardware problems

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Contents HP Scanjet N8400 series Trademark credits Copyright and licenseContents Advanced technical features TroubleshootingWhat you can do with the scanner Scanner overviewScanner hardware Power Save buttonScanner front panel buttons Quick start buttonsScan Document To buttons Copy buttonsHP Smart Document Scan Software Scanner lamp settingScanner software Scan Progress Window HP Document Copy UtilityHP Scanner Tools Utility Setup and Support Guide Where to get additional informationUser Guide Click View or print guidesLCD Reader AccessibilityControl of the scanner buttons HP Scanner Tools Utility helpBasic copying steps Scan and CopyBasic scanning steps Load paper into the document feeder Load originalsPlace an original on the scanner glass Scan from HP Smart Document Scan Software Scan from the scanner front panel buttonsScan with one button press Scan from other software programsSet up an HP Smart Document Scan Software profile Set up scan profilesClick Continue Assign profiles to quick start buttonsChoose profiles for display on the scanner front panel Import and export profiles HP Scanner Tools Utility Maintenance tab Care and maintenanceOrder maintenance and scanning supplies Clean the scanner glassMaintain the automatic document feeder ADF Clean the paper pathClean the ADF window Clean the feed roller Maintain the automatic document feeder ADF Chapter Replace the feed roller and separation pad Remove the automatic document feeder from the scanner Chapter Scanner error messages TroubleshootingChapter Scanner does not start Scanner initialization or hardware problemsScanner will not turn on Scanner operation problemsScanner has stopped working correctly Scanner does not scan right away Scanner lamp stays onScanner scans only one side of a double-sided Scanned image is fuzzyVertical white stripes appear on the printed Scanned images are not straightScanner glass is dirty Scan files are too largeWrong profile is used when a quick start button is pressed An unexpected program opens when a button is pressedScanner buttons are not working correctly Buttons do not workPaper jamming, skewing, misfeeds, or multiple-page feeds Automatic document feeder ADF problemsPaper does not feed from the ADF Bottom of the scanned image is cut offAn item loaded in the ADF jams repeatedly Scanned images have streaks or scratchesClear jams from the ADF Clear a jam from the start of the paper pathChapter Clear a jam at the end of the paper path Remove a paper jam within the ADF Contact HP SupportLong pages Advanced technical featuresPage ADF Index