1, the edge of the screen to flicker ;

2 , the entire screen flicker ;

3 , a corner of the screen flicker .

 

Understand the point of failure errors:

 

Many people think this is not enough mains supply voltage or instability caused by some " experts " will even say that because of some kind of electrical or electromechanical lamps with electronic ballasts interference color display brings power , was said to be graphics hardware failure occurred due . In fact, these views are wrong, because the display of the voltage requirement is not very strict - the vast majority of color display can be at 100v ~ 240v power supply voltage to work properly. Of course , if the voltage is too low or voltage fluctuations , then you do not recognize when another theory , but nearly two years after the implementation of the national reform has achieved initial success of rural power grids, from the fundamental solution to the rural past, the voltage is not stable , low voltage problems, and these problems are usually in the city is not there anymore , so these factors are no longer important. As for the other appliances may cause interference even impossible, after all, not mutual use of the power regulator color display , besides other electrical interference will not even bring the screen flashes !

 

Cause and Countermeasures :

 

The real cause of failure caused by the first two categories fault phenomena , usually due to line part of the circuit components soldered or +300 v filter capacitance caused the power supply decreases. The latter possibility is not high - only in the individual models and its more severe loss of capacity would thus appear to the human eye can distinguish flashes. In addition , depending on the power supply part of the circuit to put some models are special, sometimes a component part of the Weld also cause this symptom . Of course , if you put the display resolution and refresh rate is set too high or too low , then it may cause such a failure , so you can set the resolution and refresh rate intermediate values ​​to try ( Note : long-term work on overclocking cause some component aging and this failure , but more difficult to find the point of failure ) . There is a video card or monitor drivers exist bug, so you must first try to update some drivers . If the above process are invalid , you can check the focus on accelerating voltage generated by the ignition coil and high pressure is normal, because sometimes these can also cause abnormal voltage such phenomena . Note : If you turn on the TV there are flashing , then it must first check whether there is mains power supply problems - such as the capacity is too small or too large voltage fluctuations (preferably an electrician check ) .

 

In general , such a failure of maintenance requirements that you must have some ability and expertise , so I suggest you fix if you have not , then the cause of the failure to exclude a simple post-processing for the delivery of electrical maintenance department .

 

Sometimes with magnetic objects ( such as some low-end power supply box or adsl outside cats , etc. ) will result in a monitor placed near a corner of the screen flashes, so try to experience this phenomenon first clear look around the display items , usually the problem can be resolved.