I would lean more towards the inverter or the whole screen itself. If the pixels ever turn solid black then it's most likely the display itself suffering from pixels dying.

I'm more seasoned on computers, but I saw this and figured it wouldn't hurt to comment. I just got done dealing with this in my Chevy Trailblazer and the computer system that controls the vehicle had to be replaced to solve this issue. I would be driving down the road and all the sudden the check engine light would come on and the car would die.

For sure check your security settings on the wireless network you are trying to connect to. Many older devices/network cards cannot connect to some of the newer encryption methods.