Laptop power-on does not show resolution

The last time my laptop turned on the power, only hear the hard drive rotation, but the monitor is not bright, the power LED is also bright, but put in there a few days later, and then turn on the bright, the screen again back to normal, but with a period of time is not necessarily the day again, this is how?

If your notebook on the boot, do not show, you use your hands to shake the screen, if shown, it may be the screen line has problems, contact is not good. But if the shaking also does not respond, that is the graphics card has problems, is generally the graphics card power shortage, the main reason is that the notebook time used too long, old, the change of parts.

In fact, a notebook general life is about 4 years, the use of a long time, what is slow, after all, the replacement of electronic products too fast.