Hey my 17inch kds flat panel has recently started acting up. when using it the screen will randomly freeze, then the picture will turn funky colors and fade out to a black screen, if I unplug it for a day or so then plug it back it, itll work for another 10 minutes - 3months. then itll do ti again, could this be my powersupply, or something else that may be repairable, anyone know?>