The solution of the mouse light still on after the computer shuts down
The reason why the mouse is still glowing after shutting down
The keyboard and mouse power-on function of the motherboard is the most common reason why the mouse still emits light after shutdown. In order to achieve power management functions such as keyboard and mouse power-on and network wake-up, the current mainstream ATX12V power supply will provide + 5VSB power to the motherboard. That is to say, the mainstream ATX power supply does not cut off all voltage supply after shutdown, but reserves a set of + 5VSB output to supply power to the motherboard, so that the hardware such as the motherboard, keyboard and mouse are in standby. Since most motherboards now support PS / 2 keyboard and mouse booting, the power is still supplied to the PS / 2 port of the motherboard after shutdown, so that the mouse is in standby. The most obvious feature at this time is that the scanning light of the optical mouse will still Glow.
If everyone's motherboard only supports the PS / 2 keyboard and mouse to boot, the problem of the mouse still glowing after shutdown can be solved by switching to an electric mouse with a USB interface. However, there are also many motherboards that support both PS / 2 and USB keyboard and mouse booting. At this time, regardless of whether you use a PS / 2 or USB optical mouse, as long as the keyboard and mouse boot function is not turned off, then the mouse will remain in standby after shutting down. . So the most fundamental solution to solve this problem is to turn off the PS / 2, USB keyboard and mouse boot function of the motherboard.
In addition, the mouse light does not turn off after the host is turned off is also a phenomenon unique to many motherboards that use Intel chipsets. Because the Intel chipset does not cut off the 220V mains power supply (that is, the power supply is still powered), its USB port will randomly provide 0.9V-2.5V voltage output, if you are using a USB optical mouse at this time , Then the mouse scan etc. will still be on.
Since motherboards in different periods have different settings for the keyboard and mouse boot function, the methods used to turn off the keyboard and mouse boot function are also divided into the following two types:
1. Turn off the keyboard and mouse boot function in the BIOS
At present, most of the motherboard's BIOS provides settings for the keyboard and mouse boot function. You can enter the "Power Management Setup" page of the BIOS main menu and find "S3 KB Wake-Up FuncTIon" or options with similar meanings (such as "Resume On KBC", "Resume On PS / 2 Mouse", etc.), set it to "Disable", turn off the + 5VSB power supply of the motherboard to the keyboard and mouse, and the PS / 2 optical mouse will naturally not turn on after shutdown Too.
In addition, as the application of USB peripherals becomes more and more extensive, many motherboards also provide a USB keyboard and mouse boot function, on these motherboards, the USB optical mouse will continue to glow after shutdown. The process to turn off this function is similar to turning off the PS / 2 keyboard and mouse boot function. You enter the "Power Management Setup" page of the BIOS main menu and set "USB Wake-Up From S3" or an option with a similar meaning to "Disable" That's it. I believe that friends who have a certain understanding of the BIOS can easily get these settings without looking at the motherboard instructions.
2. Change the motherboard jumper
For some old motherboards that were launched in the early days, because the motherboard BIOS functions were relatively simple at that time, these motherboards could only use a jumper to turn on or off the keyboard and mouse boot function. To turn off the keyboard and mouse boot function, we must change the connection status of the corresponding jumper. For this reason, you must carefully read the motherboard instructions-there are many jumpers on the old motherboard. If you do n’t understand the meaning of the jumper, you can set the jumper. If it does, it will affect the normal function of the motherboard, and it will cause damage to the motherboard.
Although the above two methods can solve most of the problems of the mouse still glowing after shutdown, they are not a panacea. Although some motherboards provide a keyboard and mouse boot function, the motherboard BIOS does not provide a setting to turn off this function, and there is no corresponding jumper on the motherboard. In addition, the phenomenon that some of the Intel chipset motherboards we mentioned earlier randomly supply power to the USB port cannot be turned off through the BIOS or jumper settings. If you use a USB optical mouse on the above motherboard, the scan light of the mouse will not go out.
In fact, the above two special situations are actually normal phenomena, which will not affect the USB device, nor will there be any security risks. However, if you feel that the mouse lights that are still on after shutdown are really uncomfortable, you can choose the ultimate and most effective method: cut off the 220V mains power supply, that is, unplug the power cord or turn off the main switch of the socket (many My friends will use the power cord plug of the computer host, monitor and speaker in one socket.) This not only eliminates the problem that the mouse light does not go off after shutdown, but also saves the power consumption of the display and the motherboard during standby (although the power consumption is small, but it is also a good thing to save), it can be said to accomplish two things with one stone.
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