Cause analysis and treatment of computer screen flicker

Regular use of computer friends will certainly encounter some computer problems, such as computer screen flashing problem is more common, more computer users have encountered, then what causes computer screen flashing, and how to deal with it? The following author to introduce:

　　Causes and treatment of desktop computer screen flicker

First, the computer just opened the screen of the monitor shaking very badly, sometimes even the icon and text can not see clearly, but after one or two minutes will return to normal. This phenomenon occurs more in humid weather, is the cause of damp inside the monitor.

Solution: To completely solve this problem, you can use the food packaging moisture-proof sand thread string up, and then open the rear cover of the monitor, the moisture-proof sand hanging in the image of the tube neck near the tube seat near the tail. In this way, even in humid weather, there will be no more "problems".

Second, your power supply is not stable, thermal performance or anti-jamming performance, resulting in output voltage ripple too large, so that the graphics card is in the state of not working, resulting in screen flicker, this kind of problem most of the thermal performance is not good.

Solution: Turn on the power to replace its switch tube, filter capacitor, or directly change the power supply.

Third, the display of poor performance, resulting in high pressure, screen too bright to white into a, brightness potentiometer oxidation, resistance to small or bad contact, the fault of the circuit led to the display CPT high voltage or low cathode voltage, will cause this computer screen flashing phenomenon, In particular, the initial phenomenon is very similar to your present problem.

Solution: power-on, such as screen flashing phenomenon, slapping the monitor to see whether the phenomenon has been aggravated (stop after the phenomenon, do not use too much strength). Increase the display of the problem, more than the site is caused by poor contact, need to find a professional repair, no is not the problem here.

Four, video card interface is bad, the thermal performance of the graphics card is not good, there is no contact with the monitor connection.

Solution: 1, unplug the video card, check the interface is rust, with anhydrous alcohol wiped clean, while slightly the shrapnel up some. 2, such as the phenomenon immediately after the shutdown, with cotton gloves or cotton cloth unplug the video card, with hand test whether the chip is overheating (usually slightly warm), overheating for the fan, or for chips, graphics cards. 3, the use of multimeter electrical blocking r*1k to test whether the monitor connection is good, the test to shake the line, its bad probability is small.

　　The cause and treatment of the flashing of notebook computer screen

One, screen backlight caused by the screen flashing

Failure performance: The notebook backlight flicker, frequency is very fast, sometimes flash several times, sometimes it lasts a few minutes.

This is the case because of the instability of the high-voltage plate supplied to the screen backlight or the connection of the solder joint at the junction of the lamp is not strong. The high pressure plate caused by the screen flash can be replaced by the high-voltage plate can solve the problem. In our daily maintenance, sometimes out of the original high-voltage plate prices and sourcing reasons have to be modified by the general high pressure plate to achieve maintenance purposes. Lamp Joint at the virtual welding caused by a long screen flash effect is serious, careful observation of the screen in the lower left corner or lower right corner will have a small black shadow, which is the joint of virtual welding caused by the spark has been burned around the components. After the repair also cannot remove this small shadow.

Second, the motherboard charging switching circuit caused by the screen flashing

Failure performance: The notebook in the battery and the power adapter when used at the same time will appear when the screen flashing, while the lower right corner of the screen charge indicator logo will continue to switch, single power supply when the failure phenomenon disappeared. This fault in the notebook repair is relatively rare, mainly due to the motherboard on the battery switching circuit is not the instability of the components of the motherboard charging circuit components to repair the fault can be repaired.

There is also a situation due to the quality of the power adapter caused by the best to remind everyone here, the power adapter as far as possible with the original, or with a good quality OEM products. Do not cheap use dozens of yuan power supply, this kind of power is held in the hand lightly, its material can be imagined.

Third, screen itself caused by the screen flashing

In fact, in recent years by this reason caused by the notebook screen flashing a large proportion of the reason that it was put in the end because this situation is limited to the same batch of several models of notebooks. The specific fault performance is: Generally first in the notebook computer screen will have a bright line, before long, the bright line will evolve to screen flashing. I believe that the previous period of time HP's "Flash gives" is not unfamiliar, HP notebook use of LG Philips LP141WX3-TLN1 This batch of screens, there may be caused by the splash screen.