Scanner and copier do not work

if u take copy from adf scanner then clean the scanner glass. if the line is coming on print & copy both then check drum is there any line

I think that the Black lens cover is out of place and is causing the scanner to move out of place on the longer paper scans.

Two possible solutions to your problem.
If you are talking about grabbing more sheets than one from the tray, you need to make sure the tray guides are up flush against the paper.
If on the other hand you are talking about scanned/copied jobs, check the setting for your scanner, it may be set to letter size which is longer than A4, so the machine thinks it needs another sheet to complete the job causing a blank page to be sent.
Hope this helps

If you get black pages output from copies there is either light getting to the scanner (from an outside source) or the scanner itself is damaged. Most likely the latter issue. You can try puttnig a couple of extra pieces of paper on top of your scanned document before scanning (place the image directly on the glass, throw a few pieces of paper on top, and then close the cover. If the issues are still present there is a hardware failure with the scanner device itself.

I had the exact same problem! the problem seems to be with the CCD calibrating itself before it starts to scan.

If you look into the scanner, the scanner glass extends itself into the casing of scanner where the CCD rests. Every time before the scan starts the CCD starts to calibrate itself in its housing before it starts to scan. If there is any reminiscence of dust or anything object (like a piece of paper) stuck in the edges where the CCD rest, the white balancing is thrown off and it causes white lines to appear along the entire line where the dust was present.

Ideally the solution would be to open the scanner casing to clean the housing where the scanner CCD rest. This would solve the problem.

If you are unable to open the scanner casing, then try using a piece of paper or a thin edge of a cloth, slightly dampened to reach into the edge of the scanner glass where the CDD rests and clean it. This is what i did and this solved the problem.

http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=mp-56143-2&lc=en&dlc=en&cc=us&product=1832919&os=2093

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You say that the scanner glass is clean, but it takes next to nothing to cause these lines. Couldn't hurt to chack again (if you havent cleaned it 6 times already).....anyway, I found this document that is not specifically for your machine, but the menu commands should be the same:
Recalibrate the product scanner:

1. Press ENTER/MENU on the control panel of the product.
2. Press the < arrow key once to display Service and press the ENTER/MENU button.
3. Use the < and > keys to select Scan Correction and press the ENTER/MENU button.
4. Insert a blank, bright white piece of letter (8.5 x 11 inches or 216 x 279 mm) or A4 (8.3 x 11.7 inches or 210 x 297 mm) paper into the document feeder tray.

Good Luck, and please rate the response :)

Open the cover and put a piece of paper on only half the glass, and make a copy. BLOCK the left side of the glass with the blank paper.
See where it is blank. Most of the times that is a dirty or haved up mirror in the scan head. One of the small mirrors in the black assembly under the lamp. When a digital copier scanner optics become dirty, the image in that area becomes very light .

I have a feeling Your Scanner is Locked, Their is a scanner release switch , make sure the scanner swithc hasn't been moved, these move in away that they could accidentally lock the scanner when you remove paper and stuff.

There is most likely something on your scan glass that is blocking the scanner. Clean of both pieces of glass that are there when you flip open the ADF, or top cover. Try to copy again. If it is still there then there is either something on the scanner piece that moves back and forth to scan or one of your scan LEDs is burnt out and the scanner will have to be replaced.