One: The numeric keypad on the keyboard is broken

　　This is the lowest mistake that many new friends often make. It is usually a desktop keyboard. Most of the reasons for the failed numeric keypad (0123456789) are that we close the numeric keypad. You can see if the number keys on the keyboard Turn it on, it corresponds to a numeric keypad light, and when you press it, the numeric keypad above the numeric keys on the keyboard lights up.

　　Some notebook novice friends often ask me why the letters on the right side of the notebook keyboard are actually numbers instead of letters, which are tangled! In fact, this is because of the combination of number keys and letter keys of the notebook. When the numeric keypad is turned on, the letter keys on the right are arranged as numeric keys, mainly because the notebook keyboard is relatively small, and the manufacturer has set a smart switch function.

　　The solution is as follows:

　　If only the keyboard is locked, then press fn + Numlk to switch, and vice versa. There is also a mistake that novice friends often don't know. The letters are all capital letters. This is because the function of turning on the capital letter key is turned off. To cancel it, just press the "capital lock" key to switch to normal.

　　2: The keyboard part of the keyboard is invalid, this is not any regular key failure

　　The keys of the keyboard part are invalid. In this case, most of the internal circuit boards of computer keyboards fail. This phenomenon is generally due to dirt on the circuit board or conductive plastic, which makes the two unable to connect. Other factors are also possible, such as damaged keyboard plugs, line failures, motherboard damage, and abnormal CPU operation, but this is not the main reason. You can try the following methods to solve the former, the latter is generally related to computer or keyboard failure, this article will not discuss.

　　1. Disassemble the keyboard. Please note that when opening the keyboard, make sure that the side of the keys (that is, the side we are operating on) is facing down and the circuit board is facing up, otherwise the conductive plastic on each key will fall off and bring trouble to your maintenance.

　　2 circuit boards. Circuit boards are usually made of soft plastic film with engraved rows of keys. The concentration is above 97% alcohol cotton (75% medical alcohol cotton can also be used because I have used it, but it is best to use a high concentration Alcohol cotton) Gently scrub the board twice. Pay attention to the circuit of the critical fault part several times.

　　3. Check the conductive plastic in the area where the keys are broken. If there is a lot of dust on it, you can also scrub it with alcohol. Assuming the conductive plastic is damaged, the authors suggest that the conductive plastic on unused keys can be replaced with damaged ones. Although this "demolition of the east wall to fill the west wall" measure cannot make the keyboard perform all functions, it can at least extend the life of commonly used keys.

　　4. Clean the dirt on the inside corner of the keyboard, using a brush and a small brush, but pay attention to the movement gently.

　　5. Check the soldering module for false or incorrect soldering. If you can use an electric iron, you can repair the welding. Of course, this step is only applicable to friends who use electric irons, friends do not use, please skip this step.

　　6. Install the keyboard. One thing to note here is that you must wait until the alcohol has evaporated

　　3. If the above method cannot be solved, we can try to use the method again

　　Modify the keyboard driver: Open the system properties through "My Computer", select the hardware tab: open the device manager, we found that under the Windows XP operating system in China, the default keyboard driver is "standard 101/102 key Microsoft's Natural PS / 2 Keyboard. "

　　1. Right-click and select Update Driver. The Hardware Update Wizard will appear: Select "install (advanced) from list or specific location" from the list or specific location, click "next", and select "do not search". I will choose the driver I want to install. "

　　Click next to go to "Select a device driver" on this hardware page and remove the check box before compatible hardware is displayed. In the "Standard keyboard model" column, select "Japanese PS / 2 keyboard (106/109 keys)", click "Next", a "Update Driver Warning" pops up, and click "Yes". In the Confirm Device Installation window, continue to click Yes.

　　2. Complete the hardware update wizard and restart your computer.

　　Modify the registry: Click the "Start" menu, point to "Run", type "regedit", open the registry, enter "HKEY_LOCAL_MACHINE SYSTEMControlSet001ControlKeyboard Layouts", there are many subroutines, through observation, I found that the ending "0804" Simplified Chinese input method. Open "E00E0804", you can see the sub-item of "Layout File" in the sub-entry on the right, double-click to open the entry, and change "kbdus". Change "Value Data" in "dll" to "kbdjpn". And then "Confirm." In this way, you can change the "Layout File" to "kbdjpn". In all projects, it ends with "0804", and the specific input method is used to select it. then restart your computer!