States paper jame but no paper in printer. What do I do?

i want to know. printer back side some gape i see. but i don't know which work do in this back side.

Epson Clear a paper jam in printer

Resetting the printer. After the Ink Service Module has been replaced, trigger level 1, 2a, 2b, or 3 will still be displayed when the printer is turned on. Reset the printer to remove the trigger level messages.
CAUTION: Do not reset the printer if the Ink Service Module is not replaced. The spittoon may overflow. Follow the instructions below to reset the printer.

Turn on the printer

Press and hold down the Cancel button

While holding down the Cancel button, press and hold down the Resume button

Hold the Cancel and Resume buttons down for 8 seconds and then release both buttons. The Right Print Cartridge LED and the Resume LED will go off and the printer will return to a Ready state.

When the printer returns to the Ready state, it indicates the printer was successfully reset.

OK I had the hp error code 0xc18a0001 problem and here is the conversation I had with the tech...
James Cowan: HP error code 0xc18a0001
Earnest: I will assist you in this regard. I understand that a error code with 0xc18a0001 with "Ink System failure" is displayed on the front panel of the All-In-One printer. Am I correct?
James Cowan: Correct
Earnest: May I have the model number of All-In-One you are using?
James Cowan: c6250
Earnest: Please let me know the room temperature in which printer is replaced
James Cowan: 67 degrees F
Earnest:: OK. Please perform the below steps on the front panel of the printer to resolve the issue
James Cowan: OK
Earnest:: Press and hold the "left arrow" key. Press the "Setup" key and release both keys, display should say "Enter Special Key Combo". Press and release the "OK" button
Earnest: Please ignore the above steps
James Cowan: OK yes nothing seemed to do anything
Earnest: Please perform the below steps on the front panel of the printer. Press and Hold the "Print Photos" & "Red Eye Removal" buttons. Release both buttons. Display should say"Enter Special Key Combo". Press and release in sequence"Red Eye Removal", "Print Photos", "Red Eye Removal"
Earnest: Display should say "Support" and display the FW rev (something like R0616R)
James Cowan: COxxFN0723BR
Earnest: OK. Press and release the right arrow button until the display says "System Configuration Menu"
James Cowan: OK
Earnest: Press and release the "OK" button
James Cowan: OK and it says hardware failure status
Earnest: Display should say "Hardware failure status: Clear. Press OK to clear". Press and release the "OK" Button. Message changes to "Hardware failure status Cleared. Press Cancel to continue". Press and release the "CANCEL" button as many times as necessary, so that, either the "Welcome to Photosmart Express" screen appears, or, the "Ink System Failure" screen appears. Please do not try to print at this stage
James Cowan: OK
Earnest: Using the Power Button, turn the unit OFF and unplug the power cable from back of the printer and wall outlet. Let me know once you are done with the above steps
James Cowan: OK its unplugged
Earnest: Wait 30 seconds for the power to get discharged and then plug the power cable into the wall outlet first and then into the back of the printer. Turn the unit on. The printer may display message "Use POWER button to shutdown the printer" followed by "Press OK to continue". Press OK
James Cowan: OK
Earnest: Let me know the message displaying on the front panel of the printer
James Cowan: printer preparation occuring - do not interrupt
Earnest: OK
James Cowan: OK its done
Earnest: Let us print a self test page from the printer now
James Cowan: OK deal
Earnest: 1) Load letter, A4, or legal unused plain, white paper into the input tray
2) Make sure that the printer is on and loaded with unused plain, white paper
3) Press Setup. The Setup menu appears
4) Press the down arrow button to select Tools and then press OK
5) Press the down arrow button to select Self-test Report , and press OK. The self-test report prints
James Cowan: OK printing
Earnest: OK, please check whether all the colors pritned perfectly on the test page
James Cowan: Perfect
Earnest: Great... Cheers!!!
James Cowan: Thank you very much
Earnest: Now you can continue using the printer.

Dell printer paper keep on jaming

check in back side of printer there should be small paper jam check it.

first, if thare any paper is jamed in the paper tray, pull the paper stright out. take out the remaining paper. close the paper tray.
opne the front cover pull out the toner cartirdge, remove the jamed paper.
open the inner door (where the paper exit). make sure there is not paper jamed it.
close the front door. if any paper jamed inside of the machine, it should automatically eject it out.
Note: reset the printer by opening and closing the front door.

MF5750 All-In-One Laser Printer DOES NOT PRING indicate paper jam
I check and there is no paper jamed in the printer.

It starts as it will pull the paper to copy document and then indicates in the display that the paper is jamed.

Can anyone explain what the problem my be?
Please assist me.

Normal 0 I suggest you get a sheet of Card Stock (Heavy paper) and place it in the feed way. Then press the print button applying a slight amount of pressure on the Card Stock so it will feed through the printer. The reason for this, is in some cases I have been able to clear the paper track of debris that was deposited there over time.
Worth a try, as I have fixed a number of printers this way, saving costly repairs.
Hope this helps. Bud

I had to turn off my computer, unplug the printer power cord and computer cord. I restarted the computer and pluged in both cords to the printer and it worked.