Print out blank pages after clearing a paper jam

This information comes from the User Manual on pages 111-112:
http://h10032.www1.hp.com/ctg/Manual/c01150745.pdf

Internal paper jams on this machine tend to be in the two-sided printing accessory.

To clear a paper jam from the two-sided printing accessory:
1. Turn off the printer
2. Press in the tabs on the left and right side of the two-sided printing accessory, and remove it by pulling out from the center of the printer.
3. Gently pull the paper out of the rollers. If the paper has torn, check the rollers and wheels for small, torn pieces of paper
4. If it's still not clear, open the two-sided printing accessory by pulling up on the tabs, and remove any paper stuck inside it, then close the accessory by pressing down on the tabs until they lock into place
5. Replace the two-sided printing accessory by pushing it forward until it snaps back into place
6. Turn on the printer, and verify that it works by pushing OK to continue the job it jammed on.

remove the small, or scratch into pieces inside the duplex to clear the paper jam.

replace the fuser unit. and replace the transfer roller and belt,

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Step 1:

Step one: Remove any loose paper

Step 2:

Step two: Clear the jam from the All-in-One


CAUTION:Clearing a paper jam from the front of the product can damage the print mechanism. Gain access to and clear paper jams through the rear door whenever possible.

Step 3:

lear the jam from the back of the All-in-OneFollow these steps to clear the jam from the back of the product

1. While the product is still on, disconnect the power cord from the back of the product.
2. Press in the tab on the left side of the rear door to release the door. Pull the door away from the product to remove it.

Step 4:

1. Gently pull the paper out of the rollers.CAUTION:If the paper tears, check the rollers and wheels for torn pieces of paper that might remain inside the product. Remove all the pieces of paper from the product to prevent more paper jams.
2. Replace the rear door. Gently push the door forward until it snaps into place.
3. Connect the power cord to the back of the product.
4. Press the OK button to continue the current print job.

Clear the paper jam Followthese steps in the order presented to clear the paper jam. Step one: Remove any loose paper: Remove any loose sheets of paper from the input tray and theoutput tray. Take note: Do not remove jammed paper at this stage. Trying to clear jammed paper from the front of the product can damage the print mechanism. Step two: Clear the jam from therear of the product Take note : Never pull jammed paper from the front of the product. If you can pull it from the rear of the product or the tray, always try the rear first. Pulling paper from inside the front cover can cause mechanical damage to the product. 1. Pressthe Power button ( ) to turn off the product. 2. Disconnectthe USB cable from the rear of the product. 3. Disconnectthe power cord from the rear of the product. 4. Pressin the tab on the left side of the rear door to release the door. Remove thedoor by pulling it away from the HP All-in-One. Figure 1: Press the left side tab torelease the rear access door Gently remove any jammed paper orbits of torn paper from the rollers inside the product. Use both hands to pullout any whole sheets of paper to avoid tearing them. Take Note: Use a flashlight to thoroughly check the rollers and wheels for torn pieces of paper that might remain inside the product. If any torn pieces of paper remain inside the product, more jams are likely to occur. Figure2: Remove scraps of paper Replacethe rear access door. Gently push the door forward until it snaps into place. Step three: Clear the jam from theautomatic document feeder (ADF) 1. Openthe cover of the ADF. Figure 3: Open the cover of the ADF 1. Gentlypull the paper out of the rollers. CAUTION: If the paper tears when you are removing it from the rollers, check the rollers and wheels for torn pieces of paper that might remain inside the product. If you do not remove all the pieces of paper from the product, more paper jams are likely to occur. 2. Closethe cover of the ADF. Step four: Clear the jam from thefront of the product 1. Lookinside the product through the paper output tray to check if any loose or tornpaper is stuck in the rollers. 2. Gentlypull the paper out of the rollers. You must Remove paper from the front of the product as carefully as possible. If any torn pieces of paper remain inside the product, more paper jams are likely to occur, and this could damage the print mechanism. Use a flashlight to make sure that you find all traces of paper. 3. Reconnectthe power cord to the rear of the product. 4. Pressthe Power button ( ) to turn on the product. Step five: Print a self-test report Printa self-test report. Please inform me if this help you with the paper jamproblem.

You will have to reset the printer, Unplug from wall, unplug from PC, reboot, Now, plug in Power to printer, & plug in USB on PC, reboot. When at desktop next, well, now try printing again.

Paper stuck inside the HP All-in-One can cause jams or also sometimes there are some instruction that get stuck in the printer internal mechanism .
Power off the printer , unplug the power cable. Wait for 30 sec. , Replug the power cable. Power on the printer.
Check for a stuck paper or torn bits of paper.
Clear jam from the back of all-in-one
Press in the tab on the left side of the rear door to release the door. Remove the door by pulling it away from the HP All-in-One.Trying to clear a paper jam from the front of the HP All-in-One can damage the print mechanism. Always access and clear paper jams through the rear door.
Gently pull the paper out of the rollers.If the paper tears when you are removing it from the rollers, check the rollers and wheels for torn pieces of paper that might be remaining inside the device. If you do not remove all the pieces of paper from the HP All-in-One, more paper jams are likely to occur.
Replace the rear door. Gently push the door forward until it snaps into place.
Press OK to continue the current job.
Clear the jam from the automatic document feeder (ADF)
Paper can also jam in the automatic document feeder. Follow the steps below to clear a paper jam in the automatic document feeder(ADF)
Lift the cover of the automatic document feeder.
Gently pull the paper out of the rollers.
Reload and test the all-in-one
Once you have removed the jammed paper, verify that the all-in-one is still functioning properly.
Reload the all-in-one with either plain or photo paper.
Print a page from a memory card or the computer.
If you have completed all the steps listed above and are still experiencing a problem contact HP to service the product.

HP Officejet 7200, 7300, and 7400 Series - 'Paper Jam: Clear jam, and then press Enter' Message Displays on the Control Panel Display
Issue
During printing, the paper becomes stuck in the all-in-one and the error message 'Paper Jam: Clear jam, and then press Enter' displays on the control panel display.
Solution
Use the following instructions to clear a paper jam from the product:
Step one: Check for and remove any loose paper from the In tray
Do not try to remove jammed paper from the In tray. First remove any loose paper from the In tray to avoid worsening the jam.
CAUTION: Always try to remove jammed paper from the back of the printer first to avoid mechanical damage.
Step two: Clear the jam from the back of the printer
Follow these instructions to clear jammed paper from the back of the product. If the product is equipped with a two-sided printing accessory, skip to that section.
Remove the rear access door to clear the paper jam

1. Remove the rear access door by pressing the buttons on the side of the door and pulling it toward you.
Figure 1: Removing the rear access door
Rear access door
2. Gently pull the jammed paper out of the rollers.
WARNING: If the paper tears while removing it from the rollers, check the rollers and wheels for torn pieces of paper that might remain inside the product. If all the pieces of paper are not removed from the product, more paper jams might occur.
3. Replace the rear access door. Gently push the door into the all-in-one until it snaps firmly into place.

Remove the two-sided printing accessory to clear the paper jam

1. Remove the two-sided printing accessory by pressing in the buttons on the sides and then pulling the accessory toward you.
Figure 2: Removing the two-sided printing accessory
2. Gently remove any jammed paper.
WARNING: If the paper tears while removing it from the rollers, check the rollers and wheels for torn pieces of paper that might remain inside the accessory. If all the pieces of paper are not removed from the accessory, more paper jams might occur.
3. Press the button on top of the two-sided printing accessory to open the door.
Figure 3: Opening the two-sided printing accessory door
4. Gently pull the jammed paper out of the rollers.
5. Close the accessory door.
6. Reinstall the two-sided printing accessory.

Step three: Clear the jam from the automatic document feeder (ADF)

1. Remove the document feeder tray from the product by gently pulling it.
2. Lift the cover of the automatic document feeder by pulling it outward.
Figure 4: Lifting the cover of the automatic document feeder
Automatic document feeder (ADF) door
3. Gently pull the jammed paper out of the rollers.
WARNING: In the rare occurrence of a severe paper jam, you might need to remove the face plate from the front of the automatic document feeder and lift the pick assembly to remove torn pieces of paper from deep inside the automatic document feeder.
4. Close the cover of the automatic document feeder, and then reattach the document feeder tray.

Step four: Verify that the print carriage can move freely
Follow these steps to try to move the print carriage.
CAUTION: Do not force the print carriage to move if it is out of plain view or feels stuck. Forcing it may damage the printer.

1. With the product turned on, open the print cartridge access door. The print carriage might try to move into the access area. If so, allow it to move to that position.
2. Without turning off the product, unplug the power cord from the back of the product. Unplug the power cord from the power source. The power cord must be unplugged to allow the parts to be moved by hand and to reset the paper feed mechanism, without the risk of an electrical shock.
3. Looking in through either the print cartridge access door or the output paper tray, make sure the print cartridges are locked into the carriage and have not come loose. Also, make sure that there are no obstructions under or around the carriage to block it from moving.
4. Make sure the print carriage can move freely across the width of the product by gently pushing the carriage to the left and then to the right. Clear any obstructions found.
You may have to reach through the output paper tray to access the print carriage.
5. Close the print cartridge access door and plug the power cord back to the back of the product. Plug the power cord into the power source.
6. Press the On button to turn on the product.

Step five: Reload and test the printer
After you have removed the jammed paper, make sure the product is still functioning properly.

1. Reload the product with plain paper.
2. Peform a self-test by pressing and holding the RESUME button on the control panel until the product begins printing. A test page prints.

Step six: Service the printer
If you have completed all the steps listed above and are still experiencing a problem, service the product.

Clearing a paper jam - (or leftover bits of paper)

The LJ 3380 may be shown in this tutorial from HP: (do not try any disassembly other than opening the product doors as suggested in this tutorial)

HP LaserJet 3330 Clear Paper Jams

If this info is helpful, please vote.

Clearing a paper jam from the rear door Follow the steps below to clear a paper jam through the rear door.

1. Press in the tab on the left side of the rear door to release the door. Remove the door by pulling it away from the unit. Figure 1: Removing the rear door
2. Gently pull the paper out of the rollers. CAUTION: If the paper tears when you are removing it from the rollers, check the rollers and wheels for torn pieces of paper that might be remaining inside the device. If you do not remove all of the pieces of paper from the unit, more paper jams are likely to occur.
3. Replace the rear door. Gently push the door forward until it snaps into place.
4. Press Cancel to continue the current job.

Clearing a paper jam from the front door

1. If necessary, pull the input tray down to open it. Then, lower the print cartridge door. Figure 2: Lowering the print cartridge door
2. Gently pull the paper out of the rollers. CAUTION: If the paper tears when you are removing it from the rollers, check the rollers and wheels for torn pieces of paper that might be remaining inside the device. If you do not remove all the pieces of paper from the unit, more paper jams are likely to occur.
3. Close the print cartridge door. Figure 3: Closing the print cartridge door
4. Press Start Copy Black or Start Copy Color to continue the current job.