Hardware damage detection method for laptop black screen

The most common key hardware that can cause black screen is power supply, liquid crystal display, memory, hard disk, motherboard, etc. This requires us to one by one exclusions. Because the notebook is more sophisticated, disassembly more complex, the general do-it-yourself are more difficult, but we can first find out the reasons for the maintenance can save a lot of money or feel more simple to repair their own hands.

First of all, to check the power supply, to see if the laptop battery has electricity, the power plug is plugged in, this only need to see the power LED is not bright, if there is no external power supply, the first with external power plug. Before a friend Notebook black screen panic ran to show me, small make up to ask him: The notebook has not fallen, the child has not sat, messed up (encountered by children sitting on the laptop LCD screen), friends replied: "Nothing." Later, the small series plug directly into the external power of all normal! Because the laptop battery has no electricity causing the black screen. So, the first detection power is not a problem, notebook power itself has problems even plug in the external power will also be black screen phenomenon, so we have to remove the power supply, and then plug in the power, if the external power on a plug on the normal on the power of the notebook is not the right to buy a new installation is OK!

If the power LED is always on the external power is plugged in well, it means that the power is no problem. At this time carefully check the notebook cooling fan port is the wind, hard drive light is on. If the cooling fan, hard drive is no problem, restart the computer boot, the ear carefully put to the notebook to listen to whether there is a "drip", or has been "drip" sound, if there has been a drop of alarm sound that may be notebook memory loose, open the machine to plug themselves. Generally speaking, the memory bar is very not easy to bad, the notebook memory strip loose the chance is not big.

The above steps are eliminated, it is necessary to detect the problem of video card or liquid crystal display. First we need to prepare an external monitor, is the best desktop. Connect to the external display interface of the notebook with an external monitor, which is the thread that the desktop monitor connects to the host graphics interface. If the external monitor is connected to the notebook, start the notebook computer, if the external monitor shows everything is normal, the notebook motherboard, CPU, hard disk, video card, memory bar is OK. That's the problem with the laptop LCD screen. Notebook LCD screen is broken for several reasons: first, the LCD LED screen problem, the second is the LCD screen connected to the motherboard graphics interface or wiring problems. If such a problem arises, suggest that you do not have to do it, directly after the sale or repair site testing, if you can repair as far as possible, can not repair on a new monitor screen. If an external monitor does not display something, the motherboard or video card is broken. Generally speaking, hard drive bad probability is much smaller, basically can be said that the video card is bad, the graphics card burned or the graphics card connected to the motherboard line is broken, because now the notebook graphics cards are welded on the motherboard, the graphics card is broken means to change the motherboard. However, if only the welding area is not good contact can be re-welded on the line.

Perhaps because the laptop temperature is too high, and often play games and notebook heat dissipation performance is not good, will appear the graphics card temperature is too high direct black screen, Huati. This time hurriedly shut down, take to check to see whether the video card has burnt out, if the video card is not burned then only need to "wash The notebook" is the full dust, clean exhaust system, coated silica, electric fan.

In short, I met the laptop black screen must not panic, we have to first one to find out exactly where the problem. Know which part of the problem on the right remedy to find a solution to implement one after another! Do not encounter such a problem on their own hands to dismantle the machine, this is not a loss, not because of a small problem to cause a bigger problem!