MY HP PRINTER KEEP SAYING OUTPUT TRAY IS OPEN

You Could Do One thing Open The Printer remove cartridge then off the printer then on it then inter the cartridge, again off it then on it.
Hope so it helps!!!

Sir/Madam

Occasionally, media becomes jammed during a print job. An error in the software program and a jam message on the printer control panel display indicate a media jam. To prevent a jam, see the following instructions:

• Only print on media that meets HP specifications.
• Only print on media that is not wrinkled, folded, or damaged.
• Make sure that the printer is clean.
• Make sure that the input trays are loaded properly and are not too full. See the start guide for more information about loading input trays.

When adding new media, always remove all of the media from the input tray and straighten the stack of new media. This helps prevent multiple sheets of media from feeding through the printer at one time, which reduces media jams

Clearing a media jam

CAUTION: Media jams might result in loose toner on the page. Use cold water to wash toner off of clothes, as hot water will permanently set the toner into fabric. To remove toner from hands, wash hands in cold water.
CAUTION: Do not use a sharp object, such as a pencil or scissors, to remove jammed media.
NOTE: When clearing jams, including jams in the output bin, always push the print-cartridge-door release to open the top cover, and remove the print cartridge. Keep the top cover open and the cartridge out until the jam has been cleared. Opening the top cover and removing the print cartridge relieves tension on the printer rollers, which makes removing jammed pages easier.


Push the print-cartridge-door release and open the top cover.
Figure 1: Pushing release and opening top cover



Grasp the handle of the print cartridge and remove it. Set it aside.
Figure 2: Removing print cartridge




CAUTION: To prevent damage to the print cartridge, do not expose it to light any longer than necessary. Place the print cartridge in a paper bag or other opaque container until it can be placed back in the printer.

With both hands, grasp the side of the media that is most visible (this includes the middle), and carefully pull it free from the device.
Figure 3: Jammed media most visible




When the jammed media is removed from this area, replace the print cartridge.
Figure 4: Replacing printer cartridge



Press the supporting springs, and close the top cover.
Open the media input tray and remove any media from the tray.


Slide the media guides inward as far as they will go. Press and hold down the tabs inside the media input tray, and slide the media input tray out of the printer.
Figure 6: Removing media input tray




With both hands, grasp the side of the media that is most visible (this includes the middle), and carefully pull it free from the device.
Replace the input tray into the device.
Figure 7: Replacing input tray




After clearing the media jam, it may be necessary to shut down the printer, and then turn it on again.

NOTE: To add new media, remove all of the media from the input tray, straighten the stack of media after adding the new media, and then place the stack in the tray.
Clearing other media jams
CAUTION: Do not use a sharp object, such as a pencil or scissors, to remove jammed media.
If the media has jammed where it exits the printer, grasp the leading edge of the media and pull the media out through the output bin.
Figure 8: Removing jammed media from output bin




NOTE: If the printer is shut off before clearing the media jam, turn it on again, and then restart the printing or copying job.
Tips to avoid media jams
Make sure the automatic document feeder (ADF) media lever is in the correct position for the media being used. Slide it to the single-sheet setting (to the right) when scanning on thick media. Slide it to the multiple-sheet setting (to the left) when scanning on regular media.
Make sure that the input tray is not overfilled. The input tray capacity varies depending on the type of print media that is used.
Check that the input tray is securely in place.
Do not add print media into the input tray while the printer is printing.
Use only HP-recommended media types.
Do not let print media stack up in the output bin. The print media type and the amount of toner used affect the output bin capacity.
Check the power connection. Make sure that the power cord is firmly connected to both the device and the power supply box. Plug the power cord into a grounded AC power outlet.
Media jams occur in the automatic document feeder (ADF)

Occasionally, media becomes jammed during a copy, scan, or fax job.

A software error message indicates a media jam, and the Doc feeder jam Clear, Reload message appears on the printer control panel display to indicate a jam.

• The ADF input tray is loaded incorrectly or is too full.
• The media does not meet HP specifications.

Typical automatic document feeder (ADF) jam locations Input tray areas: If the page is sticking out of the input tray, try to remove it gently from the input tray without tearing the page.
Figure 9: Removing jammed media from input tray




Output paths: If the page is sticking out of the output bin, try to remove it gently without tearing the page.
Figure 10: Removing jammed media from output bin

• Intermediate location: If the page is sticking out of the input tray and into the output area, see "To clear a media jam from the automatic document feeder (ADF)" below for instructions.

Automatic document feeder (ADF) media lever If a thick media is being used, slide the media lever to the single-sheet setting (to the right). Load a single sheet of media into the ADF.
When the copying, scanning, or faxing jobs are complete, slide the ADF media lever back to the multiple-sheet setting (to the left).
Clearing a media jam from the automatic document feeder (ADF)

1. Using both hands, pull the printer control panel door toward you.
   Figure 11: Opening printer control panel door.
   

1. Remove any jammed media. Figure 12: Removing media
   

NOTE: Use only your hands to remove jammed media. Using other objects can damage internal parts.
Make sure that all of the pieces of media are removed, and then close the printer control panel door.
Figure 13: Closing printer control panel door




I Hope Your HP Printer Problem Resolved By Now,In Case You still Having HP Printer Problem Then Visit Official HP Printer Website Below Link URL:

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The user manual may help you
http://www.nodevice.com//user_manual/hewlett-packard/Printer/deskjet-3512.html

It might be saying open it and look for a jammed document.
Some printers say open a cover and close it to reset the logic board.

Instructions

Grasp the front of the output tray located beneath the control panel. Remove the output tray by lifting the front of the tray up and pulling the tray out. Set the output tray aside.

Read more: How to Load Paper into an HP Officejet All-in-One Printer ' eHow.com http://www.ehow.com/how_4489317_load-paper-hp-officejet-allinone.html#ixzz2NjlQ4lhl

Photo tray problem

' Lift the output tray up and verify that the photo tray

' is pushed in until it stops, then lower output all the

' way down. Press OK button on the printer to

'continue printing

HP Photosmart C7280 All-in-One Printer

1. Turn off printer.

2. Pull out paper tray and photo tray

3. Remove output duplexer (on back of printer)

4. Open input sheet feeder (on top of printer)

5. Open cartridge access door. (Basically lift up control panel and scanner section of the printer)

6. Turn on printer (Power button on now raised control panel)

7. Printer may display message "Performing printer alignment - Do not interrupt"

8. Wait for a few minutes until printer stops making all setup noises.

9. Close cartridge access door, close input sheet feeder, replace output duplexer, insert paper trays

10. Do a test print. All should be fine.

lift the tray a little...

hp photosmart d7160

how can i print 4x6 photo paper ? it says load paper in the main tray its only printing with large plain paper , even if its set to photo tray , and if i put the 4x6 in the main tray it says wrong paper zize ...