hp laptop lcd gets horizontal lines?

i have a hp dv5237cl laptop. it used to be occasionally just now every time i need to use it a bunch of horizontal lines ranging in widths move concluded my screen. i used to glucinium able to fix it moving the screen back and forth reasoning it was the ribbon telegram but now it seems that to fasten it i have to advance the bottom mitt corner of the lcd from behind. as well if the personal is off for a piece i must leave it on for active 15 minutes near a blank screen before it finally warms up and turns on. i have hooked it leading to an outside salute with no problems so its not the video card. is it the lcd inverter, the lcd, or the ribbon cable?