You may encounter various problems when using a laptop, among which the splash screen is one of the problems that many people report about their laptops. When your laptop has a flickering screen, the screen flickers and flickers, affecting normal use and making your eyes very uncomfortable. This situation must be resolved in time. But you need to understand the reasons for the flickering screen on your laptop, and then you can solve it in a targeted manner. So what are the causes and solutions for laptop screen flickering?
Reasons and solutions for laptop screen flickering
1. Flickering screen caused by screen backlight
Fault manifestations : The backlight of the notebook flashes from time to time, very frequently, sometimes several times, sometimes for several minutes.
This situation occurs because the high-voltage board that powers the screen backlight is unstable or the solder joints at the lamp joints are not firmly connected and sparking occurs. If the screen flicker is caused by the high-voltage board, replacing the high-voltage board can solve the problem. In our daily maintenance, sometimes due to the price and supply of the original high-voltage board, we have to modify the universal high-voltage board to achieve maintenance purposes.
The screen flicker caused by the weak soldering at the lamp joint will have serious consequences if it lasts for a long time. If you look closely, there will be a small black shadow in the lower left or right corner of the screen. This is caused by the weak soldering at the joint. The fire has burned the surrounding components. This small patch of shadow cannot be removed after repair.
2. Flickering screen caused by the motherboard charging switching circuit
Fault manifestation: The notebook will flicker from time to time when the battery and power adapter are used at the same time. The screen flashes and the charging indicator in the lower right corner of the screen switches continuously. The fault disappears when using only one power supply.
This kind of failure is relatively rare in notebook repairs, mainly due to incorrect components in the battery switching circuit on the motherboard.Stability caused by repairing the components of the motherboard charging circuit can fix the fault. There is another situation that is due to the quality of the power adapter. Here, Weijia would like to remind everyone that the power adapter should be original or better quality OEM products. Don't be greedy for cheap and use a power supply worth tens of yuan. This kind of power supply feels light and fluffy in your hand, and you can imagine the material it is made of.
3. Screen flickering caused by defective screen itself
In fact, in recent years, this reason has accounted for a large number of laptop screen flickering. Large proportion, the reason why it is placed at the end is that this situation is limited to several models of notebooks from the same batch. The specific fault symptoms are: Generally, there will be a bright line at the bottom of the laptop screen. After a while, the bright line will evolve into full-screen flashing.
I believe everyone is familiar with HP’s “flash screen door” some time ago. The LG Philips LP141WX3-TLN1 batch of screens used in HP notebooks may cause flickering screens. The specific models are: HP541, HP540, CQ45-307TX, CQ40-406AX, dv4-1213, DV5-1218, DV2211TX, DV2621, CQ40, DV4 1212TX, 6531S, CQ45, 6535s, CQ45307TX, CQV3239AU, V3159 AU, 540(259), V3803TX, CQ40-406AX, DV4-1213TX, CQ40-403AU, HP 541, V3907, CQ40-414AX, DV2-1005AX, hp520, CQ45-307TX. Among them, CQ40, 6531S, CQ45, 540, 541 and other models are the most common. They all use LG screens. Lenovo also has a small number of notebooks with LCD screen quality defects. The main models are: SL400, Y430, Y460, G430, R400
In the above situation, the only option is to replace the LCD screen with a new one. Fortunately, this kind of notebook often breaks down during the warranty period, and the problem can be solved directly to the after-sales point.
After the above introduction, everyone has a certain understanding of the causes and solutions of laptop screen flickering. If you find that your laptop has a flickering screen, you can solve it by combining the above reasons. When using a laptop, try not to operate it illegally. By using it normally and doing daily maintenance, you can avoid the flash screen problem of the laptop to the greatest extent. If the flickering screen problem of your laptop cannot be solved, you should take it to after-sales service.