Network card contact Bad also can make computer black screen

The system downloads causes the computer black screen The reason to have various forms, for example, the graphics card is broken, the motherboard is broken, and so on hardware reasons, and today we are talking about a network card contact caused by the computer black screen case, perhaps you are not very understanding of this reason, some people may not think that the network card will also make the computer to create a black screen fault, But this is really a real case, together to understand:

Two days ago, a friend's computer failed, Windows7 flagship performance for the boot screen without any display, the host small horn also did not occur any abnormal alarm sound, the author launched a test, strange is the boot did not hear "tick" a self-test sound, the author will restart the computer, Enter the BIOS setup to see the reason, the original motherboard is Ami, according to the introduction, the AMI motherboard without sound prompts is normal to start, only to hear the host fan whistling, but why no signal transmission to the monitor, Win7 download is not the display of data cable connector slot in the needle broken?

The author carefully observed a few, the result is: normal. What's the reason? Two days ago, a friend of the computer memory of a failure, Win7 system download In use also appeared in the black screen phenomenon, and then changed a memory of the failure of the rule. Is the computer out of memory? Take a new memory, replace his memory, reboot, and the display is still not lit, this is how it? The CPU is not broken. However, if the CPU is broken, there should be a sound of alarm. For the sake of prudence, removed the CPU detection, everything is OK.

The author re-examine the internal structure of the host, the graphics card and sound card is integrated into the motherboard, Win7 system to see this situation is likely to be integrated graphics card failure, if so, that is to change the motherboard, a friend to listen to change the motherboard, scratching his head said: "This computer is outdated, not worth changing the motherboard, You'll see what else is wrong. "The author carefully looked at the host inside, the remaining NIC did not detect, remove the network card, reboot, friends eyes a bright, excited to say:" OK, OK, the monitor has a signal. "Sure enough, Win7 display of the display lamp from yellow to green, then appeared the Windows System splash screen, it seems that the reason for the black screen is caused by the network card." Subsequently, the author with a brush and clean paper towel to wipe a network card, reinsert the motherboard slot, reboot again, the problem is completely resolved. It seems that the reason for the black screen is due to poor contact with the network card.

Really can not do, only unexpected things ah, I did not think of the network card because of the unsanitary and caused by poor contact, so that the computer has a black screen failure, windows7 system download estimates for the cause of the failure of many people are unexpected, so, Through this case again let us add a lot of experience.