I apologise for my lack of knowledge but, my situation is that my laptop (HP pavilion g 56 - 130sa) screen just keeps going black like as though it's turned off but I can still hear the fan on it so I read somewhere that there's a problem with the ram? just wondering if I'd have to buy the exact same hp spare or if I could use one from my dad's laptop (toshiba satellite c660d - 181) or not? not even sure if this question makes sense but please help!