First, read the English article below.

Most new computers come with at least a year of warranty. If your warranty is still active, contact the manufacturer to have it repaired for free or for a reduced price. Attempting the repair yourself will likely void the warranty. If your monitor won't display an image, turn it on and watch the lights at the edge of the monitor. If one or more lights turn on, continue to the next step. If the lights won't light up, the power supply is broken (or one of the attachments leading to the power supply). This is usually caused by a blown capacitor. You may repair it yourself, but be aware that the power supply includes dangerous, high voltage components. Unless you have significant electronics repair experience, take your monitor to a professional repair service.  Other signs of a blown capacitor include a loud humming noise, lines across the screen, and multiple images. The power supply unit is one of the most expensive components in the monitor. If the problem is more serious than a blown capacitor, the price of repair could be considerable. A replacement may be a better idea if your monitor is getting old. Try this if your monitor just displays a black screen, but the power indicator light does come on. If you can see the image when you point a light at the screen, the monitor's backlight is at fault. Follow these instructions to replace it. . If most of the screen works but a few pixels are "stuck" at one color, the fix is usually easy. Keep the monitor on and try the following:  Wrap a pencil tip (or other blunt, narrow object) in a damp, non-abrasive cloth. Rub very gently over the stuck pixel. Rubbing too hard can cause further damage.  Search for stuck pixel repair software online. These conduct rapid color changes to jolt the pixel into working again. Purchase hardware designed to plug into your monitor and repair dead pixels. If none of the above works, you may need to replace your screen. These are signs of physical damage. A monitor at this stage is often beyond repair, and attempts to fix it can end up... 

Now, please write a short abstract for it in Chinese. Abstract:
检查保修。 检查电源指示灯。 用手电筒照一下显示器。 修复坏点 尝试修复蜘蛛网裂纹或黑色斑点。 更换显示器。 尝试其他维修。