Recently, i just repair my laptop model Asus K501lx' s screen. after the replace a new screen. i notice that the new screen resolution was a normal lcd screen with 1366 x 768. the original screen was LED LCD with 1920 x 1080 full hd. besides, lot of the laptop software cant running properly and took too long to start up. What fixed this issue was an advice from nathan at geek squad support, he suggested me to replace the ram from the pc and now the pc is working fast as new.