How do I fix 1200 error - Lexmark X4270 All-In-One InkJet Printer

Error code: 1200
This error code is commonly associated with the Dell 922 printer. Usually you might see the cartridge moving front and back and slamming itself against the printer. You need to tighten the strings located on the back of the printer and then it should work fine

Clean the carriage rail. This is the round chrome piece that the carriage assy that holds the cartridges rides on. Use a paper towel that is slightly moist.
Be sure to not force anything. Unplug the printer after you get the carts in the middle. Move them to one side and clean and then move them to the other and repeat.

Lift up the scanner to reveal the cartridge compartment; under the chrome rod on which the cartridges run there are two small gaps about 8cm apart. In the right one should sit the paper sensor which is a small black rod that hooks downwards; the problem I had was my sensor had bent up and out of the gap so all I had to do was bend it gently back into position using a small screwdriver.

Hope you get it to go.
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All The Best: Pineworks