Computer hardware failure
1. If the optical drive does not read the disc or the reading capability is not good, do not think that the optical drive is broken. In many cases, the laser beam cannot be fully transmitted because there is much dust on the optical head. The optical drive does not have much technical content, so open the shell and do some cleaning, most of them can be reused. Be careful when handling. The coating on the surface of the bald head is fragile. Do not use too much force when cleaning, nor use too much ethanol.
2. You may have been "powered" by the computer. That's because the insulating paint on the exterior of the chassis is removed or the socket is not grounded. Generally speaking, static electricity will not have much impact on the computer. But if there is too much static electricity, there will still be some minor problems. For example, some very short solder joints are short-circuited and caused a restart. So if you have a friend who is "electrically", you can consider grounding the case shell, which will be much better.
3. If the integrated sound card of the motherboard is broken, you can consider buying a new sound card. If you switch to Crown 8738, and your motherboard is a model after 845, there will be a problem, that is, choose to shut down, but the machine restarts! In addition, friends who use innovative SB5.1, this model does not have a driver under VISTA. Some netizens have made one out, but compatibility is a problem, often blue screen. The innovative sound card can only be used in VISTA only if it is above 7.1, but there is no EXA special effect.
In addition, the sound card driver of some brand machines, even if the driver software of the right model is found on the Internet, can not be installed, or the small speaker is installed but it does not produce sound. You must go to its official website to download it. Use, it is estimated to have done a specific setting, very depressed. Especially Lenovo!
4. The current chassis generally has a front USB interface. Sometimes U disk and MP3 can be used normally, but the camera and mobile hard disk can not be used, prompting "unrecognized USB device". This is normal. When using the camera, it is best to insert it in the port behind the chassis. The data cable of the mobile hard disk will generally have two connectors. It is recommended to use all the connectors to ensure stable voltage. It is better to connect it later. Because the front is connected by a wire, sometimes a little bad contact will affect. If the system displays "USB device surge" during use, it indicates that your motherboard has a problem. If the warranty period does not expire, change it as soon as possible.
USB 2.0 is a USB interface standard released in 2000 with a theoretical maximum transmission speed of 480Mbps (about 60MB/s). The port has four cables (five cables for MicroUSB and MiniUSB), and the maximum output current is 0.5A. USB 2.0 is currently the most common version of USB port, almost all computers have USB 2.0 port, most USB devices also support USB 2.0. USB 2.0 hub. The device can provide USB high speed or full speed connection on the uplink port. The device also provides USB high-speed, full-speed, or low-speed connections on the downlink port. When the uplink port is connected to an electrical environment that supports only high-speed, full-speed, and low-speed connections, the high-speed, full-speed, and low-speed USB connections on the downlink port are enabled. When the uplink port is connected to an electrical environment that supports only full or low speed connections, the USB high-speed connection on the downlink port is disabled. USB 3.0 Hubs is higher than usb 2.0 in terms of transmitting data.
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