Computer black Screen Troubleshooting example

Computer black screen fault commonly known as "monitor can not be lit", is a common computer failure, but also a difficult to deal with the fault, especially for beginners. The author has encountered a case of such a failure two days ago, the process of troubleshooting is introduced to everyone, I hope to give you in the future to deal with such failures to do a reference.

This is the author in 03 DIY A machine, the main configuration is as follows: CPU for the speed of the Dragon 2200+, the main pull for the KT400, memory for the modern 256 trillion DDR266, hard disk for Sittie 80G, graphics card for 64 Gigabit GF2, display is the king of the Great Wall 17.

This machine has been running very stable, can be a few days before the boot of the monitor did not display any fault, reboot several times the display still give me a cold big black face, this makes me often deal with the fault of the old bird is really nervous a Chen. After a little calm, the phenomenon of failure to do a bit of analysis, black screen failure is generally caused by the following components: The monitor itself has a fault, video card damage, host power problems, motherboard or CPU failure. From the symptom to see the monitor led normal flashing and grating appears, you can determine the monitor is good.

The CPU fan turns normal after the host is turned on, the hard disk can start normally, this indicates the possibility of the host power failure is very small. CPU, the speed of the quality of the CPU is very good plus no overclocking use, it should not be damaged, and from the boot without any sound of the situation, it will not be graphics and memory problems, because these two parts if there is a problem, the machine will be issued a different length of the whistle sound. Finally, the likelihood of causing the failure is concentrated on the motherboard.

Suddenly think of the previous increase due to the modification of CMOS improper, beyond the motherboard can withstand the range, resulting in a similar type of motherboard self-protection black screen failure, after the CMOS to clear and restore the default value after the failure. Will this be due to the virus and other reasons to change the value of the CMOS settings caused it?

Let's try this first, disconnect the power and open the chassis, and then find out the location of the CMOS jumper, as a result of a short jumper, on the motherboard to find a, but must remember the position, with jumper will clear the CMOS jumper after a few seconds, the jumper took off and put back to the original location. Next, turn on the power to open the host, found that the failure has not changed the slightest, it seems that this time the white busy.

is the motherboard component burnt? That's bad, because the motherboard maintenance is difficult, most of them are replaced, will remove the cover of the host placed in the light of careful observation, hoping to find the problem, and suddenly see the memory of the CPU fan near the connection with the slot part of a thick layer of dust cover, So hard to press down the ram at both ends of the RAM, remove the memory strips, find a brush and blow the balloon, the memory slot and the dust on the memory strip clean, and blow the balloon thoroughly blown, the memory stick inserted, the parts of the connection and connected to the power, press the start switch, only listen to "drip" of a sound, Finally, the screen again appeared in English self-test prompts, and normal access to the system. The failure was finally ruled out.

After summing up the cause of the failure, mainly because of the high-speed rotation of the CPU fan generated by the airflow led by a lot of dust, and constantly blowing to its close to the memory and slots, and memory and slots have many contact points and small gaps caused by a large number of dust stranded, as the dust accumulated more and more thick with the role of moisture, This failure occurs when a short circuit is created between the memory strip and the insert-bad contact. To avoid such failures, we should develop a regular clean computer parts of good habits, so as to avoid the author such a Troublesome thing.