Notrbook 电脑 screen 不能显示， 咋办？ 预谢~！

Compaq notebook, about 6-8 years old [do not have the pc handy this moment];

was working well,

then the screen did nor light up, [only very faded, as-if, the windows logo in the black, if viewed at a particular angle],

restarted several times, still the same problem,

Questions:

1. what the problem/s is or are?
2. how to solve this?

Thanks a lot for your help,