Sir, I would like to ask how can fix this epson lx300 printer.When i turn it on all the lights flashes and the head moves from left to right and it stops.Good afternoon shaikh and welcome to CH

#1... If this printer is the DOT matrix / Impact style a lot of times on a hard ERROR and most of the time the "head" is bad.

This issue you are having is not exactly as I found on Epson WEB site but does make since & here is that info "This indicates that the printer is out of paper. Make SURE the paper release lever is in the correct position, then install the paper and try printing.

#2... If this printer is a "tracker" feed please look around the feed / roll to make sure there is no scraps of paper.

#3... From what you are describing you have a bad head / micro switch maybe.

#4... Are you using PLAIN feed option (plain paper) or are you using tracker feed tear off paper

#5... If you are using tracker feed paper is the paper multi part (2 or 3 layer) or single layer.

#6... Is the printer beeping as well as flashing the lights.

Here is a link to Epson's web site in-case you need the user manual, tech brief, product information. http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCookie=yes&infoType=Doc&oid=14245&prodoid=8237 

Please come back and let us know how you are making out, MIKE