hi. im an electrician and im very intersted in electronics but know nothing about them so please bare with me.i have a cheap upconverting digitex dvd player.ive had it for a year and all of a sudden the power does not stay on.i turn it on and the lcd screen blinks.can any one help me here.i took it apart and played around with it and it worked for a while.any 1 know how to trouble shoot this????