Screen and battery acting up (Lenovo SL300)

Hi guys,

I'm having deep troubles with my laptop screen, it's not new but it's becoming increasingly unbearable -_-
It's a flickering vertical bar in the middle made of small horizontal bars, sometime it will be a white bar (same spot) or will show negative colors

It comes after a while of the laptop being on,
I can't really figure out what it is, i'd like to determine what can be done and which part is responsible, is it a bad connector or is it the graphics altogether? (picture of screen attached)


My second problem is with my replacement battery, I bought a 9 cell generic battery abroad to replace my 6 cell lenovo battery, which was no longer being charged - after i bought the new one, it was working fine - as I use my laptop plugged in most of the time, i didn't notice the problem at first, indeed when I use it on battery power it works fine for a while but it randomly shuts off as if I removed the battery, however if I turn it back on there is still power, but it shuts off within a few minutes I can be sure of it, I installed BatteryBar and the lenovo utility, both seem to show that the battery is fine (wear 29%) (picture attached)

What is your advice, how can I get to the root of those problems?

Thanks a lot!