HP A646 Inkjet CC001A#B1H manual An Unknown device message appeared Windows only

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Chapter 8

Solution 3: Make sure that the printer power cord is securely attached

Solution: Make sure that the printer power cord is securely attached and the printer is turned on.

Cause: The printer might not be connected to a power source. If this did not solve the issue, try the next solution.

Troubleshooting

Solution 4: Wait until USB hub is not busy and try printing again

Solution: Wait until the other device is no longer being accessed or connect the printer directly to the computer.

If an Photosmart dialog box is displayed, click Retry to try to re-establish a connection.

Cause: You might be using a USB hub or docking station that has multiple devices connected to it. Accessing another device can temporarily break the connection to the printer.

The printer would not print when it was connected to the computer with a USB cable through another USB device

Try the following solution for this problem.

Solution:

1.Turn off the computer.

2.Connect the printer directly to a USB port on the computer.

3.Make sure the cable is securely attached to the computer and to the USB port on the back of the printer.

4.Disconnect all USB devices (including the hub) from the computer.

5.Turn on the computer.

6.Try printing again. If the problem persists, repeat this procedure using a different USB port on the computer.

Cause: Two-way communication between the printer and the computer was interrupted by another device attached to the hub.

An Unknown device message appeared (Windows only)

Try the following solution for this problem.

Solution:

1.Disconnect the USB cable from the printer.

2.Disconnect the power cord from the printer.

3.Wait about 10 seconds.

72 Troubleshooting

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Contents User Guide Page Contents Maintenance Print from a computerSpecifications TroubleshootingHP support and warranty Regulatory and environmental informationContents HP Photosmart A640 series User Guide Chapter Find more information Get startedHow do I? Photosmart at a glance Front and rear viewsControl panel buttons and indicator lights HP TouchSmart screenUse the touch screen Use the stylusStylus storage areas Photosmart Menu Touch screen frameTouch screen frame Touch View and Print on the Photosmart menu Thumbnail view and 1-up viewTo view photos in thumbnail view To view photos in 1-up viewPhoto icons Setup MenuPhoto icons Related topicsHow to use the Setup Menu To use the setup menuPrint Sample Setup menu optionsTools Print Test Printer StatusPreferences Bluetooth HelpGet started Load your paper Paper basicsChoose the best paper for the job Paper loading tipsTo load paper To change the paper typeLoad your paper Paper basics Touch Bluetooth Touch Device Address Print from a Bluetooth deviceWhat you need for a Bluetooth connection To find out the device address of the productTo print from a Bluetooth device Print photos from a Bluetooth deviceTo connect to and print from other Bluetooth devices Touch BluetoothPrint without a computer Print from a memory cardSupported memory cards Insert a memory cardTo select photos, add copies, and print multiple photos Print photos from a memory card or USB deviceOne touch photo prints To deselect all photos To print all photosTo deselect photos To deselect one photo To remove a specific photo from the print queue To print a photo indexTo print camera-selected photos Remove a memory card Save photos from a memory card to another devicePrint from a PictBridge-certified camera or device Get creative To use the Frames creative option Add framesAdd captions To use the Caption creative option Draw on photos To use the Draw creative optionTo use the Clip Art creative option Add clip artUse Design Gallery Specialty printing projects To use the Design Gallery creative optionCreate albums To use the Albums creative optionPrint without a computer Create Greeting Cards To use the Greeting Card creative optionPanoramic photos Passport photos To use Passport Photos modeTo use Panoramic Photos mode To use Photo Stickers mode Photo stickersVideo Frame prints Create Photo LayoutsTo use the Photo Layouts creative option To print a frame from a video clipCrop a photo Enhance or edit your photosUse Photo Fix To turn off Photo FixUse Pet Eye Fix Adjust photo brightnessRemove red-eye from your photos Touch up a photoTouch Slideshow on the Photosmart menu Create and view slide showsTo view photos in a slideshow To print from a slideshowPrint without a computer Transfer photos to a computer Print from a computerPrinter software To save photos from a memory card to a connected computer To delete photos or files from a memory cardIf a memory card is already inserted, do the following To change the HP Real Life technologies settingsEnhance your photos Change the print quality Change the print settings for the print jobPrint quality settings To select a print quality and speedTo select a specific paper type Change the paper typeChange the paper size To select a paper sizeGuidelines Print photosPrint borderless photos To print a borderless photoPrint photos with a border To print a photo with bordersPrint panoramic photos To print panoramic photosPrint on index cards and other small media To print on index cards or other small mediaPrint from a computer To clean the print cartridge from the printer MaintenanceClean the print cartridge automatically Align the print cartridgeInsert or replace the print cartridge To access the printer status screenView estimated ink levels View printer statusTo insert or replace a print cartridge Get print cartridge ordering information Store the printer and print cartridge Print a testPrint a sample Store the printerRemove ink from your skin and clothing RemedyInstallation failed TroubleshootingSoftware installation issues Solution 1 Turn off virus softwareTry the following solution for this problem Solution 2 Accept the license agreement during installationSolution 3 Retry the installation To enable Software Install ModeInstallation did not start automatically Printer does not appear in Printers and Faxes Windows onlySolution 4 Make a drive letter available Solution 2 Make sure Software Install Mode is enabledSolution 3 Turn the printer off and then back on Printing and hardware issues Printer is plugged in, but it will not turn onSolution 3 Unplug product and contact support online Solution 1 Check the power cordSolution 2 Press the On button once and not quickly Printout did not appear Solution 1 Make sure the USB cable is securely attachedSolution 2 Make sure that the printer is turned on Computer and printer lost communicationTry the following solution for this problem Solution An Unknown device message appeared Windows onlyWindows users Touch Preferences Touch Borderless Printer did not print borderless photosCould not save photos from the computer to the memory card Blank page came out of the printer Solution 1 Reduce image sizeSolution 2 Use correct paper Print quality is poorSolution 3 Print on correct side of paper Bluetooth printing problemsMy Bluetooth device cannot find the printer Solution 4 Clean print cartridgeTouch Bluetooth Touch Security level Solution 2 Check Bluetooth Visibility settingSolution 3 Check Bluetooth Security level setting Cause Bluetooth Security level may be set to HighPhoto printed with borders No page came out of the printerPrint quality is poor Click Order Supplies Online Windows or Supplies Mac OS Shop for ink suppliesTo order cartridges from a connected computer Shop for ink supplies HP support by phone HP support and warrantyCheck the HP support Web site first Phone support periodAfter the phone support period Additional warranty optionsPlacing a call System requirements SpecificationsPrinter specifications Paper Tray Print Cartridge Regulatory model identification number Regulatory and environmental informationRegulatory notices FCC statement Vcci Class B compliance statement for users in JapanEco-Tips LED indicator statementEnvironmental product stewardship program Paper use Material safety data sheetsPower consumption PlasticsRegulatory and environmental Information Chemical Substances ItalianoEU Declaration of Conformity EMCChapter April Software installation To install the softwareAppendix a