There are many reasons why the computer cannot be turned on and the screen is black, such as damage to the monitor, damage to the motherboard, damage to the graphics card, poor contact with the graphics card, damage to the power supply, damage to the CPU, etc. To deal with computer black screens, we basically use a combination of elimination and replacement. The principle should be to replace and eliminate the most suspicious components first.
1. First unplug the data cable connecting the monitor to the host, and then turn on the power switch of the monitor separately. Generally, if the monitor is normal, it will display the monitor's manufacturer information or a prompt that the monitor is not connected. If it can be displayed normally, it means that the monitor is unlikely to be damaged.
2. Check whether the contact is good. You can separately check whether the contact between the graphics card and the monitor is good, and whether the contact between the graphics card and the motherboard I/O slot is good. If necessary, remove it and reinstall it to ensure that it is installed in place and the contact is good.
3. If there is no problem with the monitor, check whether the CPU fan is running. If it is running, use a multimeter to measure whether the voltage output is normal ±12V, ±15V. If it is not normal, you can try another power supply.
4. If a black screen still appears, remove the components installed in the computer and leave only the CPU, graphics card, and memory module. This will limit the cause of the fault to the CPU, motherboard, and memory. Generally, if there is a memory failure, there should be an alarm sound. If the memory failure is eliminated, only the CPU and motherboard are left.
1. What is the difference between PVC plastic-coated cloth and PVC knife cloth? 2. What are the scraping cloth manufacturers in Jiangsu? 3. In what areas are PVC coated cloth and knife cloth mainly used?
If you are using a vivo mobile phone, you can directly take the mobile phone to the service center for inspection and processing, enter the browser to search the vivo official website--service--service center--view all--select the province and city to check local services. Center address and ****.
If repair is required, the repair price is based on the price of replacement parts at the service center. You can check the price of some parts on the vivo official website APP of the mobile phone - My - Repair Price - Select the model; Service The center replaces parts without labor charges.
The difference between PVC coated cloth and knife cloth is the production process and raw materials:
The gray cloth used in knife cloth is high-strength polyester filament (that is, industrial yarn). It is made by three times of knife coating, three times of plasticizing, three times of calendering, and cooling and shaping. It is characterized by high knife scraping force and tearing force, and a smooth surface (the strength and flatness are determined by the gray fabric). The gray cloth used in the plastic-coated cloth is made of ordinary civilian polyester filament after roller coating and floating knife troweling, then oven plasticizing and calendering and cooling. It has high strength and good surface smoothness (civilian knife scraping cloth). Mainly due to the gray fabric), but the adhesion is higher than that of knife scraping cloth (also determined by the gray fabric). The same places are all coated with PVC paste resin (the same materials? Different formula ratios) As far as I know, there is no manufacturer of knife scraping cloth in Jiangsu? There is one in Zhuozhou, Hebei (a designated enterprise by the Ministry of Railways). Knife cloth and plastic-coated cloth are both used for waterproofing such as tarpaulins, tents, and tarpaulins. Nowadays, tarpaulin machinery and equipment production lines are also used to produce knife scraping cloth. The effect has basically reached the product quality of the knife scraping cloth machinery and equipment production line, and the equipment cost is very low. If you have any other questions, you can contact Xingtai Shentai Machinery Equipment Manufacturing Co., Ltd., which specializes in tarpaulin and air duct mechanical equipment production lines. (There are also air duct cloth production lines, seamless air duct production lines, etc.) We can discuss with each other. Improve together.