Geeetech

I print via USB, I`ll check later the firmware
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It is not a problem with the file, becouse i hace tried different files, different programs and even different computers

Some time ago i got a geetech prusa i3 pro w, and recently ir has been giving me some problems. It will print perfectly for a while, then suddenly stop printing and enter in a cycle of aproximately 4 seconds, in which:
-the lcd screen will turn on and off
- the y axis motor makes 2 clanking sounds ...