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It sounds like the carriage inside the machine is obstructed by something. That, or it came off its " track"
Try this. Open the machine like you are going to change the ink tanks.
Now, unplug the machine from power, wait ten seconds then plug it back in.
Watch the carriage, does it move at all?
Also, look on all sides of the carriage.. Do you see any debris, paper, broken plastic pieces, or anything at all that looks like its obstructing the normal movement of the carriage?
Its definitely stuck.. Lets try the following.. And be careful~
Open the printer, unplug the machine and then plug it back in and when you here it making a noise try to grab the carriage and pull it to the left..
It may simply be off track and need a "nudge or tug" to get it moving again or put the motor back on track.
Or, it may be that the motor / belt has broke and thats why it cant move the carriage.
So the question is, can you move it by hand.. And if you can get it moving by hand and then you turn it off and on.. Can the machine move it left to right normally?
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In that case, theres only one way to figure out what has the carriage stuck.. You have to open up the printer as shown on this page https://www.youtube.com/watch?v=CjqHFN-da8M
once you get the top cover off so you can see the entire rail system left to right. You should be able to feel around and figure out what has the carriage stuck. Once you remove the obstruction or lift the carriage back into gear or back onto its track.. Then you should be good to go.
Granted, this isnt the easiest repair to carry out. But its not the most difficult either as its mainly just screws you need to remove.
With that being said.. Its either open it up and fix it or replace it. While Im not a fan of the square look of the newer models, they are priced a bit more reasonably http://amzn.to/21lbMqX