Kamvas Pro 13 display disconnects randomly and has grey lines on it

I've used the kamvas pro 13 tablet display with the same computer for like 3 years now, and I recently decided to get a new computer because the old one's hard drive was shot. I switched to an asus zenbook flip 15. When I turned my tablet on with the new computer, thin grey lines that looked almost like crack marks showed up on my tablet's display, and they got bigger when I hovered the pen over it. The tablet's display would also disconnect and reconnect randomly, and I would get a black screen saying that there was no signal (even though the HDMI cable was plugged in the computer and everything). 

This tablet has done so much for me over the years and I really can't afford to get a new one. Please help!