How to judge whether the ccfl lamps or lcd inverter for LCD Monitor is broken?
1. The lamp tube turns red. Once the lamp is turned on, it will turn red (many of them will be normal after a few seconds or minutes of use), which means that the lamp life has expired. It is best to directly remove the screen and replace the lamp. Because one lamp is red, the service life of the other three lamps is almost the same.
2. The lamp is on fire. The lighting phenomenon of the lamp is mainly reflected in the lighting and smoking at the corner of the display. In case of this problem, most of the lamp tubes have been damaged or the lamp connecting wires have been burnt.
How to judge whether the ccfl lamps or lcd inverter for LCD Monitor is broken?
3. The screen is obviously dark above or below. At the moment when the display is turned on and off, it is obviously felt that the upper or lower part of the display screen is obviously dark. In this case, there is one or a group of lamp tubes above or below that do not work, and the lamp tubes have been damaged, so you can directly remove the screen and replace the lamp tubes.
4. The screen brightness is uneven. The current displays are multi-lamp displays. Generally, there are four lamp tubes, some of which are at least two. When a lamp tube is damaged, the image brightness is uneven. For example, the upper lamp tube is dimmer, and a certain corner is obviously darker, that is, the upper lamp tube is damaged. Touch to display the position of the lamp tube on the display screen. Through temperature comparison, you can also judge whether the lamp tube is damaged. The temperature of the normal lamp tube position on the display screen should be consistent.
How to judge whether the ccfl lamps or lcd inverter for LCD Monitor is broken?
5. One end of the lamp is on and the other is off. Dismantle the display and measure each lamp with a lamp tester (a special instrument for testing single lamp). If it is found that only one lamp is on and the other is not, the lamp has been damaged.
6. Touch the high voltage bag to check the lamp tube. If it has been determined that the lamp tube is faulty, but it is not sure which group or which lamp tube is damaged, you can also touch the high-voltage bag to detect which group of lamp tube is damaged. The specific method is to turn on the machine for a period of time, turn off the machine, and touch the high pressure bag with your hand. The temperature is obviously high, that is, that group of lamp tubes have been damaged.