HP Laserjet M2727nf automatic scaning problem.

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I Share a Supported links please visit and read step by step. I hope solved your issues.
Read More... Vista Win 7 Duplex Printing Troubleshooting Guide
and HP Support document HP Support Center
and HP Printer Support

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First print a test page out from a computer. If this has lines then its either a dirty drum in the toner cartridge or a bad fuser. IF the test print is fine then you just need to clean the glass over the scanner.

You will need to plug the printer andcomputer together with a USB cable in order to use the printer's scanningcapabilities. The scanning unit on theMX310 features an automatic document feeder on top of the printer, which willscan multiple pages itself. You can also choose to load documents on thescanning glass, which is covered by the scanner's lid. This is how to do it. 1. Turn on the printer by pressingthe "Power" button until it illuminates and turn on the attachedcomputer. Wait for the printer to finish its initialization process beforecontinuing. 2. Place the document face up inthe automatic document feeder if the document's papers are uniform in andfit in the feed tray. Adjust the paper-width guide to the of thedocument's papers. 3. Place the first page of thedocument face down on the scanning glass after you have lifted the scanningunit's cover, if you choose to not use the automatic document feeder. Close thecover again slowly so the document does not shift on the glass. 4. Press the "Scan"button on the printer's control panel, then press either "Black" or"Color," depending on the type of scan you would like to perform. 5. Retrieve the scanned documentfrom the automatic document feeder's output tray once the scan job is over.Otherwise, click on the "Yes" button on the computer's screen,indicating you would like to scan another page. 6. Lift the scanning unit's cover,remove the document from the scanning glass and place the next page of thedocument face down on the glass. Close the scanner's cover and click on the"OK" button on the screen to scan the next page. Repeat this processuntil all of the document's pages have been scanned.

If you use the HP Solution Center and tell it to scan a document, after each page you need to place the next page on the scanner and then click on "Add Page". Also set the document type as PDF.

Solution found: Change the scan default format to Tiff, but then save the document as PDF on the workstation. We think this is a newly discovered but unintended feature of the newest hp scanner software package.

This is usually happening on Windows Vista or Windows 7, the problem is the driver. Download file hpiscn.dll and copy it into the install directory, overwrite if it asks. This should solve the problem.

When you print to the M2727nf does all the prints come out ok? If they do you might want to get some canned air and blow out the adf assy and clean the scanner glass. If this does not work find the settings on the printer to do a scanner calabration, it will tell you how to do this from the display.

Based on the assumption it's mechanically ok, check the cable connection between the document feeder and the base, if damaged or worked look it can cause errors. If it is a sensor error, check for a small bit of paper or even a staple from a prior jam.

this is how you use the scanning features of your printer.
To use the scan features, the HP all-in-one and computer must be connected and turned on. The HP all-in-one software must also be installed and running on the computer prior to scanning. To verify that the HP all-in-one software is running, look for the HP all-in-one icon in the system tray at the lower-right side of the screen, near the time.
NOTE: Closing the HP Windows system tray icon can cause the HP all-in-one to lose some of its scan functionality and result in the No Connection error message. If this happens, you can restore full functionality by restarting the computer or by starting the HP Image Zone software.
For information about how to scan from the computer, and how to adjust, resize, rotate, crop, and sharpen scans, see the onscreen HP Image Zone Help that came with the software.
Scan an original
Follow these steps if the HP all-in-one is directly connected to a computer through a USB cable.

1.
Load the original face down on the right front corner of the glass.
2.
In the Scan area, press Scan To . The Scan To menu appears, listing destinations, including applications, for anything that is scanned. The default destination is whichever one was selected the last time this menu was used.
3.
To select an application to receive the scan, use the arrow buttons to highlight it and then press OK or Start Scan . A preview image of the scan appears in the HP Scan window on the computer.
4.
Make any edits to the preview image in the HP Scan window. When finished, click Accept . The HP all-in-one sends the scan to the selected application.

Send a scan to an HP Instant Share destination
Follow these steps if the HP all-in-one is directly connected to a computer through a USB cable.

1.
Load the original face down on the right-front corner of the glass or, if using the document feeder tray, in the document tray.
2.
Press Scan To on the control panel of the HP all-in-one. The Scan To menu displays.
3.
Use the Up Arrow and Down Arrow buttons to highlight HP Instant Share .
4.
Press OK or Start Scan to select the destination and scan the image. The image is scanned and sent to the selected destination.
NOTE: If an original is detected in the automatic document feeder, one or more pages are scanned. If no original is detected in the automatic document feeder, a single page is scanned from the scanner bed.
NOTE: For Windows users, the HP Image Zone software opens on the computer, and the HP Instant Share tab displays. A thumbnail of the scanned image will display in the Selection Tray. For more information on the HP Image Zone, see the onscreen HP Image Zone Help that came with the software.

Stop scanning
To stop scanning, press Cancel on the control panel.