My ASUS X551LA has a small battery compartment on left side bottom with no screws. I can't get it open to reboot my computer that I can't start (black screen with cursor in the middle). The ASUS logo appears when first turn and then just spins to a black screen - I try clicking cursor and see the blue spinning circle for 10th of a second but nothing happens. Want to reboot to see if solves this issue but can't get to battery. Please tell me how to open that compartment. .