I have a Lexmark X6570 All In One Wi-Fi model. Just had the problem
where I went to print and received an error message saying that the
cover was open (when it wasn't). I noticed that the back right hand
corner had slightly popped out of place for no apparent reason. Tried to
pus it back into place with no luck.
Here's what happened and how to fix it:
There are two plastic hinges at the back of the 6500 series printers
that allow the top cover to open for access to the ink cartridge
carriage. The lower ends of the hinges are cylindrical shaped and each
contains a very stiff steel spring inside. They are designed to prop the
cover of the printer up and hold it open when opened. As the plastic
material ages, it may weaken and the tension of the internal spring may
break the round end of the hinge off. This causes the printer cover to
not fully close (even though it may appear so). There is a switch in the
main printer body that detects when the top cover it open (even
partially), and the printer won't work in this condition.
To fix this, open the top cover and carefully disconnect the 3 wire
harnesses and the ribbon cable that run from the top cover to the base
of the printer. Then remove the 'paper jam' hatch cover from the back of
the printer. There are two phillips screws on the back panel of the
pinter (one is located behind the paper jam hatch cover). Remove these
screws (they secure the plastic hinges in place). You should now be able
to lift the complete top cover/ scanner table assembly off the rest of
the printer. Look for a steel spring about 3 inches long...remove this
along with the round base of the hinge which may have broken off and
remained down inside the printer. Glue this piece back onto the end of
the hinge, but leave the spring out. Now reassemble the printer in the
reverse order of disassembly and you should be good to go. Note that the
top cover or the printer will not stay propped open on it's own with
the spring removed, but this is not really an issue.
I am not sure if new replacement hinges are readily available from Lexmark or other sources.
If you need further help, I’m available over the phone at https://www.6ya.com/expert/john_472b46f833fc3109