Front cover dore open or cartridge missing

Hello !!

For tha particular error you are facing, here is the reason. These printers have a switch that triggers an interrupt when the toner door is closed. Usually there is an arm on the door that pushes the switch. It is quite sensitive and delicate. Then sometimes there is a tab on the printer's toner and if that breaks off then that error will be generated.

But in your case as you have not removed or inserted the toner, I think option 1 is applicable to you.

Now, if this printer is in warranty you should send it to HP for Free repair/replacement.
and chek BLOW links too for paper jam and cleaning
Paper jam Message Displays for HP LaserJet 1018 1018s 1020 and 1020 Plus... Cleaning the Printer


??? ?????
???? ? ????? ?? ???? ???? ???? ? ?? ???? ???? ???? ???? ?? ?? ??? ???? ??
??? ?? ???? ???? ???? ???? ????? ??? ???? ???? ?????? ??? ??? ???? ???? ????? ??? ??? ??? ?? ??????? ?? ???? ???? ???? ?? ???? ???? ??? ???? ?? ???? ???? ??? ???? ? ?? ???? ???? ???? ??? ??? ? ?? ????? ??? ???? ???? ????
????? ?? ???? ??????? ?????? ?? ????? ????

Did this just suddenly happen or was it after you replaced the toner cartridge or opened the door?
I have found that if the toner cartridge is not completly positioned into the printer, it can give this error.

If you are using a non genuine HP cartridge, it is very likely it is defective and can not read the chip on the cartridge. Replace the toner with a Genuine HP cartridge.

Hello, the more certain is that this bad since the cartridge, remove to accommodate it again, if you want to be tested for direct printing of the printer opens and closes the cover 3 times, then she will try to print a test page.

If it does then verifies that the lid has a plastic tooth that goes to the printer, press the button when you close the lid, check that this function is working

send your printer for service. seems like, one or two sensors are malfunctioning.

verify if you are printing with the correct paper size..... long is 8.5 by 13 and not 8.5 by 14.....

or

1. delete the installed driver
2. turn off the printer and let your computer detect the printer.... let it finish
3. restart your computer

Had the same problem. Changed cartridge. Still didn't work. I suggest taking out cartridge and examining inside of printer carefully. I found a piece of balloon and a hair tie (aargh!, my kids). Works now.
Just wanted to post this as one more thing to check before junking the printer or spending money on HP support.

Hi,
Problem is you have paper jam!!! Seek for the paper inside the printer, pull out cartridge!!! when you do that, turn off printer and disconnect power cable for 1min. Pull back the cable, turn printer ON!!!
good luck!!!

Try for a reset option. I cannot say which it is with your particular model- Usually it involves switch off- depressing a combination of button then with the buttons still pressed - switch on. Try www.fixyourownprinter.com