Hi i am a certified Canon tech on this copier. the problem you have is due to the scanner cable that runs from the top of the scanner to the main board in the back of the machine. what happens is when you take the scanner unit off to get to the fuser screw holes the cable should be removed from the main board under the rear panel with alot of screws. some people when they put the scanner unit back on they dont watch the position of the cable and when the unit slides back to open the cartridge door the cable is pulled part way out of the board connecter. the first thing i would do is to remove the back cover and chech the connector for the scanner cable to see if the cable is in all the way. also sometimes i have found that some one has pinched the ribbon cable damaging it underneath the scanner and replacing it with a new cable took care of the problem. the cable cost around $20. hope this helps.
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Could also be the carriage stuck. Try to activate the change-ink button, and see if the print heads move over. If they do, unplug the printer from the wall, and then see if you can move it gently across from right to left.
If it's hard to move, try a little (1 or 2 drops) sewing machine oil in the metal shaft, move heads back and forth a couple times, then plug in again.
Your carriage got stuck in service station,is there any noise coming from the right side of printer then there will be broken gear.
Power on your printer,after you got carriage jam error open cartridge access door and wait 5 second when you see that gears trying to move,use your hand to pull your carriage to left side.Don't use much force.If your carriage got free then install your print head and cartridges.If this will happen again then take it to service center they will change the service station or broken gear but the cost goes much high.
It's a problem with the scanner unable to "see" its home sensor. The home sensor is a black & white film strip stuck onto the flatbed glass, just above where the scanner head homes. The printer needs to "see" the two little black 1mm square bumps in the white area. When the scanner head "homes", as it just disappears under the plastic it should move left and right as it looks at the home strip. If it keeps going and chatters at the right-stop it didn't see the home strip. Clean under the glass unplug all of the wires and get a can of air spray and spray the leads and the adf plug in too.
I had the same problem. I disconnected the scanner from the PC. restarted my computer. Shook my scanner a little bit while PC was rebooting (or maybe a little slap) and when PC was rebooted), i plugged my scanner back and it recalibrated automatically.
The serial number is located on the guide for the print head holder. Open the cover, as if your going to change the ink. To the right of the print head holder (where the ink goes), on the guide that moves the holder back and forth, there is a white label with the serial number. The number starts with four letters and ends with five numbers.
Try this one open up the scanning lid, use a small allen wrench and pull the screw at the left side of the frame that holds a 1 inch wide by 12 inch long piece of glass. pot ur finger inside the housing and begin to roll the gear/rubber belt to move the scanner bulb assembly towards the left side as far as you can go. Then, turn the machine off and on.
If you are adept at printer repair, remove the right
side cover, by removing the two screws in the hand hold area. pull the
cover out at the bottom, using the handhold area, it will pop quite
loudly. Once you get the cover off, you will find a large sheetmetal
box with a row of connectors across the top of the circuit board. You
do not need to remove the sheetmetal box to access the connector I am
referring to. The four wire bundle I'm referring to has black, yellow,
blue and red wires going to it. It's pretty much in the center of the
row of connectors Be sure it is secure. If the connector is securely
inserted and no pinched wires are observed, the next most likely cause
for this issue is a calibration stip for the scanner head inside of the
scanner top. There are no spare parts for that level of repair. Opening
the scanner top to repair it is likely to let in dust or debris and you
won't find much that can be done if the calibration strip has moved or
delaminated. The scanner top will need to be replaced. I believe the
part number for the scanner top is Q3948-60191 unless it's been
replaced with a newer part number.
that shud work if it doest contact hp....