✔ 最佳答案
Hi
I though your laptop's screen has connection problem with your laptop mainboard, it's usually hardware error, cannot fix by yourself. By the way, you can do some selftest first (make sure the PC is still alive!).
Is the computer can boot up the Windows? Why I ask this, because I want to make sure that is not the software problem of the laptop. I suggest you use an external monitor to test your lapton like LCD Monitor or CRT Monitor.
How to do it? You have to plug the LCD / CRT monitor's cable onto your laptop before you turn on your PC. And, find the laptop monitor signal switching function key, it is usually a Blue Function key "Fn" + monitor/laptop screen icon key on your laptop keyboard, in case, my laptop's monitor signal icon is on "F3".
How to use that key? The function has 3 modes, 1.Lapton Monitor Only, 2. External Monitor Only, 3. Both laptop and external monitor. You can try to press / hold the key during your laptop is starting up (repeate to use that Fn + function key, the model will be switch recyclely). Meanwhile, your external LCD/CRT monitor SHOULD receive the laptop monitor signal. If yes, that's your laptop's LCD's problem, call your vendor, else I've no idea yet.