I have the following error message:

Reboot it. Unplug wait plug it back in

The simplest thing would be to try unplugging the printer from the power source. Let it rest for 5 - 10 minutes then plug back in to the power supply and see if that resolves the problem.

If not you are going to need to do a thorugh inspection to verify that all paper remnants have been removed.

The following is for the MP600:

Issue: ERROR LCD: The paper is jammed. Clear the paper and press [OK].
Solution: Removing paper jams MP600


Removing Obstructions or Jammed Paper If [Paper output slot - The paper is jammed. Clear the paper and press OK] appears on the LCD, follow this procedure to clear the paper jam Clearing paper jams from the auto sheet feeder (ASF) or paper output slot
Clearing paper jams inside the printer
Clearing credit card-sized or 4" x 6" paper jammed inside the printer

ASF / Paper Output Slot

1. Turn off the printer.
   
   
2. Remove paper from the ASF.
   
   
3. Gently pull the jammed paper out.
   
4. 1. If paper is visible from the ASF, use both hands to pull the paper out slowly.
      
   2. If paper is visible from the paper output slot, use both hands to pull the paper out slowly.
      
      
      The above illustration shows a PIXMA MP500.
      
      
5. If the paper tears and a piece of that remains inside the printer, open the scanning unit (printer cover) and remove the paper from inside the printer.
   
   Note:
   Be careful not to touch the components inside the printer.
   
   
   
6. Turn on the printer and confirm that the Alarm light is off.
   (If the jammed paper remains in the printer, the paper may be automatically ejected.)
   
   
7. Load paper back into the ASF.
   
   
8. Press to clear the message and continue printing. If you are printing from an application software, follow the instructions displayed on your computer.
   

Top
Paper jams inside the printer

1. Turn off the printer and disconnect the power cord and USB cable.
   
   
2. Remove the jammed paper slowly using the following procedure.
   
3. 1. Open the rear cover to check if the paper is jammed.
      
      
      
   2. Pull out the cassette and check if the paper is jammed inside the cassette area.
      
      
      
   3. Stand the printer with the left side down, holding the document cover.
      
   4. Press the tabs together and pull the green cover toward you.
      
   5. Check if the paper is jammed.
      (If you were not doing Duplex printing, you do not have to follow this procedure.)
      
      
      
      
   6. Close the green cover and place the printer back to a normal position.
      
4. Reconnect the power cord and power on the printer. Confirm the Alarm light is off.
   
   
5. Load paper back into the ASF or cassette.
   
   
6. Press to clear the message and continue printing. If you are printing from an application software, follow the instructions displayed on your computer.
   

Top

Clearing credit card-sized paper jammed inside the printer
Credit card-sized and 4" x 6" sized paper must be loaded properly. If this media is not loaded properly, it will feed into the printer and will not exit. Credit card-sized paper should only be loaded in the ASF and in portrait orientation. 4" x 6" sized paper can be loaded in the ASF or cassette. But must be loaded portrait orientation.
If credit card-sized paper was loaded in landscape orientation in the ASF and did not eject (exit), please follow this procedure.

1. Turn off the printer.
   
   
2. Load the same paper type that is jammed inside the printer in portrait orientation.
   
   
   
   
3. Power on the printer.
   The paper stock in the ASF will automatically feed the jammed paper from the printer.
   
   
4. To resume printing, load the paper in portrait orientation.

If 4" x 6" sized paper was loaded in landscape orientation in the cassette and did not eject (exit), please follow this procedure.

1. Turn off the printer.
   
   
2. Open the rear cover.
   
   
3. Fold in four a piece of letter-sized plain paper.
   
   
4. Push in the folded paper until it hits the jammed paper.
   
   
   
   
5. If the jammed paper is visible from inside the printer area, pull it out and proceed to step 7.
   
   
6. If the jammed paper cannot be pulled out, push in the folder paper from the rear so the jammed paper is in between the feed rollers.
   
   
7. Pull out the folded paper and close the rear cover.
   
   
8. Power on the printer and confirm that the Alarm light is off.
   The jammed paper should automatically eject.
   
   
9. To resume printing, load the paper in portrait orientation.

Trust this is helpful.

You can access Canon online support info here. Enter paper jam as a search, then choose #4 to remove the obstruction.
Also see this:
Issue: Paper is jammed inside the printer
Solution: Removing paper jams MP600

Removing Obstructions or Jammed Paper If [Paper output slot - The paper is jammed. Clear the paper and press OK] appears on the LCD, follow this procedure to clear the paper jam Clearing paper jams from the auto sheet feeder (ASF) or paper output slot
Clearing paper jams inside the printer
Clearing credit card-sized or 4" x 6" paper jammed inside the printer

ASF / Paper Output Slot

1. Turn off the printer.
   
   
2. Remove paper from the ASF.
   
   
3. Gently pull the jammed paper out.
   
4. 1. If paper is visible from the ASF, use both hands to pull the paper out slowly.
      
   2. If paper is visible from the paper output slot, use both hands to pull the paper out slowly.
      
      The above illustration shows a PIXMA MP500.
      
      
5. If the paper tears and a piece of that remains inside the printer, open the scanning unit (printer cover) and remove the paper from inside the printer.
   
   Note:
   Be careful not to touch the components inside the printer.
   
   
   
6. Turn on the printer and confirm that the Alarm light is off.
   (If the jammed paper remains in the printer, the paper may be automatically ejected.)
   
   
7. Load paper back into the ASF.
   
   
8. Press <OK> to clear the message and continue printing. If you are printing from an application software, follow the instructions displayed on your computer.
   

Top
Paper jams inside the printer

1. Turn off the printer and disconnect the power cord and USB cable.
   
   
2. Remove the jammed paper slowly using the following procedure.
   
3. 1. Open the rear cover to check if the paper is jammed.
      
      
   2. Pull out the cassette and check if the paper is jammed inside the cassette area.
      
      
   3. Stand the printer with the left side down, holding the document cover.
      
   4. Press the tabs together and pull the green cover toward you.
      
   5. Check if the paper is jammed.
      (If you were not doing Duplex printing, you do not have to follow this procedure.)
      
      
   6. Close the green cover and place the printer back to a normal position.
      
4. Reconnect the power cord and power on the printer. Confirm the Alarm light is off.
   
   
5. Load paper back into the ASF or cassette.
   
   
6. Press <OK> to clear the message and continue printing. If you are printing from an application software, follow the instructions displayed on your computer.
   

Top

Clearing credit card-sized paper jammed inside the printer
Credit card-sized and 4" x 6" sized paper must be loaded properly. If this media is not loaded properly, it will feed into the printer and will not exit. Credit card-sized paper should only be loaded in the ASF and in portrait orientation. 4" x 6" sized paper can be loaded in the ASF or cassette. But must be loaded portrait orientation.
If credit card-sized paper was loaded in landscape orientation in the ASF and did not eject (exit), please follow this procedure.

1. Turn off the printer.
   
   
2. Load the same paper type that is jammed inside the printer in portrait orientation.
   
   
3. Power on the printer.
   The paper stock in the ASF will automatically feed the jammed paper from the printer.
   
   
4. To resume printing, load the paper in portrait orientation.

If 4" x 6" sized paper was loaded in landscape orientation in the cassette and did not eject (exit), please follow this procedure.

1. Turn off the printer.
   
   
2. Open the rear cover.
   
   
3. Fold in four a piece of letter-sized plain paper.
   
   
4. Push in the folded paper until it hits the jammed paper.
   
   
5. If the jammed paper is visible from inside the printer area, pull it out and proceed to step 7.
   
   
6. If the jammed paper cannot be pulled out, push in the folder paper from the rear so the jammed paper is in between the feed rollers.
   
   
7. Pull out the folded paper and close the rear cover.
   
   
8. Power on the printer and confirm that the Alarm light is off.
   The jammed paper should automatically eject.
   
   
9. To resume printing, load the paper in portrait orientation.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks

Try this...With te printer off line, press the paper feed button making sure thre is paper in both feed trays. Once it print, a blank page go in and change back t your desired papper source. Hope that helps, please let me know.

Ash

When the print head temperature falls, the error is
automatically cleared.
Note:
If the print head temperature exceeds the specified limit
when the scanning unit (printer cover) is opened, the
carriage does not move to the ink tank replacement
position.

You can access Canon online support info here. Enter paper jam as a search, then choose #4 to remove the obstruction.
Also see this:
Issue: Paper is jammed inside the printer
Solution: Removing paper jams MP600

Removing Obstructions or Jammed Paper If [Paper output slot - The paper is jammed. Clear the paper and press OK] appears on the LCD, follow this procedure to clear the paper jam Clearing paper jams from the auto sheet feeder (ASF) or paper output slot
Clearing paper jams inside the printer
Clearing credit card-sized or 4" x 6" paper jammed inside the printer

ASF / Paper Output Slot

1. Turn off the printer.
   
   
2. Remove paper from the ASF.
   
   
3. Gently pull the jammed paper out.
   
4. 1. If paper is visible from the ASF, use both hands to pull the paper out slowly.
      
   2. If paper is visible from the paper output slot, use both hands to pull the paper out slowly.
      
      
      The above illustration shows a PIXMA MP500.
      
      
5. If the paper tears and a piece of that remains inside the printer, open the scanning unit (printer cover) and remove the paper from inside the printer.
   
   Note:
   Be careful not to touch the components inside the printer.
   
   
   
6. Turn on the printer and confirm that the Alarm light is off.
   (If the jammed paper remains in the printer, the paper may be automatically ejected.)
   
   
7. Load paper back into the ASF.
   
   
8. Press <OK> to clear the message and continue printing. If you are printing from an application software, follow the instructions displayed on your computer.
   

Top
Paper jams inside the printer

1. Turn off the printer and disconnect the power cord and USB cable.
   
   
2. Remove the jammed paper slowly using the following procedure.
   
3. 1. Open the rear cover to check if the paper is jammed.
      
      
      
   2. Pull out the cassette and check if the paper is jammed inside the cassette area.
      
      
      
   3. Stand the printer with the left side down, holding the document cover.
      
   4. Press the tabs together and pull the green cover toward you.
      
   5. Check if the paper is jammed.
      (If you were not doing Duplex printing, you do not have to follow this procedure.)
      
      
      
      
   6. Close the green cover and place the printer back to a normal position.
      
4. Reconnect the power cord and power on the printer. Confirm the Alarm light is off.
   
   
5. Load paper back into the ASF or cassette.
   
   
6. Press <OK> to clear the message and continue printing. If you are printing from an application software, follow the instructions displayed on your computer.
   

Top

Clearing credit card-sized paper jammed inside the printer
Credit card-sized and 4" x 6" sized paper must be loaded properly. If this media is not loaded properly, it will feed into the printer and will not exit. Credit card-sized paper should only be loaded in the ASF and in portrait orientation. 4" x 6" sized paper can be loaded in the ASF or cassette. But must be loaded portrait orientation.
If credit card-sized paper was loaded in landscape orientation in the ASF and did not eject (exit), please follow this procedure.

1. Turn off the printer.
   
   
2. Load the same paper type that is jammed inside the printer in portrait orientation.
   
   
   
   
3. Power on the printer.
   The paper stock in the ASF will automatically feed the jammed paper from the printer.
   
   
4. To resume printing, load the paper in portrait orientation.

If 4" x 6" sized paper was loaded in landscape orientation in the cassette and did not eject (exit), please follow this procedure.

1. Turn off the printer.
   
   
2. Open the rear cover.
   
   
3. Fold in four a piece of letter-sized plain paper.
   
   
4. Push in the folded paper until it hits the jammed paper.
   
   
   
   
5. If the jammed paper is visible from inside the printer area, pull it out and proceed to step 7.
   
   
6. If the jammed paper cannot be pulled out, push in the folder paper from the rear so the jammed paper is in between the feed rollers.
   
   
7. Pull out the folded paper and close the rear cover.
   
   
8. Power on the printer and confirm that the Alarm light is off.
   The jammed paper should automatically eject.
   
   
9. To resume printing, load the paper in portrait orientation.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

Solution: Press ON/OFF switch to reset the multifunction device

Reset the device when it is not functioning properly. If the device is not functioning properly or to clear memory, reset it.

1. On the operator panel, press and hold the <ON/OFF> button for one second. (The display will go blank.)
   
   Note: It may be necessary to unplug the power cord if pressing the ON/OFF button does not shut off the printer.
   
   
2. Wait approximately ten seconds and then press the <ON/OFF> button again.
   
   
3. Wait until the device has completed its cycling process before submitting another job request.

Solution: Removing paper jams MP800R / MP830 / MP530

Removing Obstructions or Jammed Paper If [Paper output slot - The paper is jammed. Clear the paper and press OK] appears on the LCD, follow this procedure to clear the paper jam Clearing paper jams from the auto sheet feeder (ASF) or paper output slot
Clearing paper jams inside the printer
Clearing credit card-sized or 4" x 6" paper jammed inside the printer
ASF / Paper Output Slot

1. Turn off the printer.
   
   
2. Remove paper from the ASF.
   
   
3. Gently pull the jammed paper out.

1. If paper is visible from the ASF, use both hands to pull the paper out slowly.
   
2. If paper is visible from the paper output slot, use both hands to pull the paper out slowly.
   
   

1. If the paper tears and a piece of that remains inside the printer, open the scanning unit (printer cover) and remove the paper from inside the printer.
   
   Note: Be careful not to touch the components inside the printer.
   
   
2. Turn on the printer and confirm that the Alarm light is off.
   (If the jammed paper remains in the printer, the paper may be automatically ejected.)
   
   
3. Load paper back into the ASF.
   
   
4. Press <OK> to clear the message and continue printing. If you are printing from an application software, follow the instructions displayed on your computer.

Top

Paper jams inside the printer

1. Turn off the printer and disconnect the power cord and USB cable.
   
   
2. Remove the jammed paper slowly using the following procedure.
   
   
3. Open the rear cover to check if the paper is jammed.
   
   
   
   
4. Pull out the cassette and check if the paper is jammed inside the cassette area.
   
   
   
   
5. Stand the printer with the rear side down, holding the document cover.
   
   
6. Press the tabs together and pull the green cover toward you.
   
   
7. Check if the paper is jammed.
   (If you were not doing Duplex printing, you do not have to follow this procedure.)
   
   
   
   
8. Close the green cover and place the printer back to a normal position.
   
   
9. Reconnect the power cord and power on the printer. Confirm the Alarm light is off.
   
   
10. Load paper back into the ASF or cassette.
    
    
11. Press <OK> to clear the message and continue printing. If you are printing from an application software, follow the instructions displayed on your computer.

Top

Clearing credit card-sized paper jammed inside the printer
Credit card-sized and 4" x 6" sized paper must be loaded properly. If this media is not loaded properly, it will feed into the printer and will not exit. Credit card-sized paper should only be loaded in the ASF and in portrait orientation. 4" x 6" sized paper can be loaded in the ASF or cassette. But must be loaded portrait orientation.
If credit card-sized paper was loaded in landscape orientation in the ASF and did not eject (exit), please follow this procedure.

1. Turn off the printer.
   
   
2. Load the same paper type that is jammed inside the printer in portrait orientation.
   
   
   
   
3. Power on the printer.
   The paper stock in the ASF will automatically feed the jammed paper from the printer.
   
   
4. To resume printing, load the paper in portrait orientation.

If 4" x 6" sized paper was loaded in landscape orientation in the cassette and did not eject (exit), please follow this procedure.

1. Turn off the printer.
   
   
2. Open the rear cover.
   
   
3. Fold in four a piece of letter-sized plain paper.
   
   
4. Push in the folded paper until it hits the jammed paper.
   
   
   
   
5. If the jammed paper is visible from inside the printer area, pull it out and proceed to step 7.
   
   
6. If the jammed paper cannot be pulled out, push in the folder paper from the rear so the jammed paper is in between the feed rollers.
   
   
7. Pull out the folded paper and close the rear cover.
   
   
8. Power on the printer and confirm that the Alarm light is off.
   The jammed paper should automatically eject.
   
   
9. To resume printing, load the paper in portrait orientation.

Thanks

Thiru

PLEASE REMOVE THE POWER CABLE AND REINSERT IT IT SHOUL BE OK AND IF STILL PERSIST JUST RESTART THE PC IF STILL RESIST PLEASE LET SOME TECHNICIAN TO CHECK FOR THE SENSOR FOR THE PAPER JAM ...
GOOD LUCK

I cannot receive faxes or print anything.
The message says that "there is no paper in the machine". There us plenty of paper in the machine and I push "OK" and get the same message