The monitor is an important output device in the computer, is the window of human-computer dialogue. It is a durable device in the computer configuration, in the use of the process, the monitor will inevitably have one or the other problem, the host is normal but the monitor does not light up the fault believe that many users have encountered, the monitor does not light up what is going on? The following I give you an analysis of the host normal but the display does not light the reasons and repair methods.
1, check the host power supply, when the monitor does not light up, black screen no image display, first check whether the host power supply is plugged in, the power supply fan is normal rotation, the host panel power indicator, hard disk indicator is flashing, because if the host power supply does not work or the motherboard is not powered If the power supply does not work or the motherboard is not powered, the display does not receive a signal, of course, there is no image display.
We are the lcd manufacturers for small size displays such as 1.8inch 128x160, 2.0inch 176x220, 2.0inch 240x320 IPS, 2.8inch 240x320, 3.5inch 320x240 and 3.5inch 320x480 IPS ect.2, check the power supply of the monitor, when the monitor does not light up, check whether the monitor's power supply is plugged in, if the monitor's power switch is a light touch switch, when the monitor is powered on, you should hear a slight "pop" sound, at which point you can judge the monitor's switch power circuit is good. Then check whether the monitor's power switch has been turned on, whether the monitor's power indicator lights up, and whether there is a "sizzling" sound when the hand is close to the monitor screen and moves slowly, while the sweat on the palm of the hand has the feeling of being sucked away, which indicates that the monitor's high-voltage circuit is in normal working condition.
3, check the data line of the monitor, if it is sure that the monitor has been charged and there is high voltage generation, the monitor still does not light up, continue to check whether the data line interface of the monitor and the graphics card signal output interface is in good contact, there is no loose situation; then unplug, check whether the D-type interface is bent or broken pin or a lot of dirt. This is a problem often encountered by many users, when connecting the D-type socket, uneven force, or forget to tighten the interface fixing screws, so that the interface is loose resulting in poor contact, or due to improper installation methods or excessive force, so that the pin within the D-type interface broken or bent, resulting in poor contact.
4, check whether the installation of the graphics card is correct, open the chassis to check whether the installation of the graphics card is correct; whether the contact with the motherboard slot is good; whether the graphics card or too much dust in the slot causes poor contact; whether the chip on the graphics card is burnt, cracked traces. When the display does not light up due to the graphics card, the computer boot up self-test that there is a short four long "tick" sound prompt. When installing the graphics card, hold the upper part of the graphics card with your hand and insert it into the slot with even force, so that the fixed screw port of the graphics card matches the screw port of the main chassis. When not inserted correctly, do not force the fixation and cause the graphics card to twist. If you confirm that the installation is correct, you can remove the card and wipe the gold finger pins with alcohol or install a new slot (only for PCI graphics cards). If not, you can only change a good graphics card a try. If the monitor does not light up, in determining whether the graphics card is intact, we must consider the compatibility of the graphics card with the motherboard.
The above method of checking the monitor does not light up is based on the monitor itself no electrical fault, that is, after turning on the host power monitor power indicator from green to yellow but the monitor black screen no image display. If the above methods do not solve the problem of the monitor does not light up, it is recommended to send professional repair stores to ask professionals to repair.
