Recently, like yesterday, my screen started to become erratic and freak out. It would last for a while. I finally figured out that if I shifted the screen, the display would display normally. What happens to the screen is that it goes white with a whole bunch of skinny black horizontal lines going across the screen all the way up and down the screen. You can make out some enlarged words and parts of the windows that were opened when the screen was normal. I can sometimes replicate the display error by pressing and slightly bending the screen holding. What's going on?