first of all thank you all for you help
the DVD player was working and then after 2 days stop playing, but i checked the cables and they are ok. So i bought a CD for cleaning the player but my DVD player don't play any type of CD/DVD i insert so it didn't even play the cleaning disk.
The model is TF133 (
http://www.lightinthebox.com/7-inch-...33_p46548.html ) don't buy this ****, or anything else that is a noname brand!!!