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I see from the post that you are having an issue with the access door not closing on your HP Printer. Don't worry I'll try my best to help you with this,
To provide you with an accurate solution, I'll need a few more details:
Could you provide me with right Product number for this printer? (Ensure you do not share any of your personal information such as serial, phone number, email ID, etc...) http://hp.care/2bygf7l
Have you checked for any obstructions inside the printer?
Have you checked if the rollers move freely?
In the meantime, let's start off by performing a Hard reset on the printer and make sure that the printer is connected directly to the wall outlet and not to the surge protector.
With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.
Remove USB cable, if present.
Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.
Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord and then plug back the power cord to the printer.
Turn on the printer and wait till warm-up period finishes and the printer is idle.
If you have followed the steps suggested and checked for the rollers and obstructions inside the printer and still have the issue, I would personally suggest this could be a printer hardware failure. If your product is out of warranty, please choose paid options to get the tech support number.
Please use the following link to create yourself a case number, then call and it may help speed up the call process: