What about computer keyboard malfunction?

Computer keyboard malfunction is the problem that we will often appear when we surf the Internet, but how is this going to happen? Let's answer it for you here:

　　When the computer is slow to boot, we can do the following steps:

After the computer keyboard failed, it is recommended to test the keyboard to another computer, if the keyboard failure, please repair or replacement, if there is no fault please fix the system.

　　Step 1:

Boot press F8 does not move to advanced options appear in the Let go, select the last Known Good Configuration carriage return repair.

　　Step 2:

Boot press F8 into safe mode after exiting, select reboot or shutdown in the boot, you can enter the normal mode (repair the registry).

　　Step 3:

If the computer keyboard failure is still the same, please use the system with the System Restore, restore to you do not appear this time the failure of repair (or restore the system with the restoration of the software).

　　Step 4:

If the computer keyboard failure is still, using system disk repair, open a command prompt to enter Sfc/scannow return (SFC and/between a space), insert the original system disk repair system, the system will be automatically compared to repair.

　　Step 5:

If the computer keyboard fails to continue, set the optical drive in the BIOS to insert the original system into the first boot device and press R to select "Repair Installation".

　　Step 6:

If the computer keyboard fails, it is recommended to reload the operating system.

(1) After the power-on computer can not detect the keyboard to check the keyboard interface is not a problem. Because it is most convenient to check, you do not have to disassemble the keyboard. Unplug the keyboard line from the chassis and plug it back in again. Reboot to see if the fault disappears, this can eliminate the keyboard interface due to bad contact caused by computer keyboard failure, if there is still a problem, you can use a multimeter to measure the keyboard interface on the motherboard, if the boot when measuring the 1th, 2, 5 core of a voltage relative to the 4th core of 0, Note that the line is broken, find a breakpoint and reconnect it; if there is no problem with the interface on the motherboard, remove the keyboard check to check the security of the keyboard is normal, if it is not normal to replace, if normal then use a multimeter to measure the keyboard cable connector voltage is normal; If the motherboard keyboard interface voltage is normal and is not normal here, It means that there is a disconnect between the keyboard, the replacement of the keyboard cable can repair the computer keyboard failure.

(2) Computer keyboard failure of a keyboard button pressed after a failure to bounce off the diagnosis method: A key of the keyboard can not be bounced because of some keyboard, the spring aging under the key cap so that the elastic weakened, causing the spring deformation, resulting in the contact can not be separated in time, so can not bounce. The fault repair method is: The key cap cover under the spring replacement, or a slightly stretched spring to restore its elasticity, and then reload the key cap can be.

(3) Computer keyboard failure Press a key on the screen does not respond to the fault diagnosis method: Press A key screen no response is mainly due to the internal circuit board has dirt, leading to the keyboard contacts and contact between contacts, so that the key failure or the button inside the spring film aging and deformation, resulting in poor contact. The fault repair method is: First, the shell of the keyboard, with a soft brush to remove the dirt on the circuit board, while using anhydrous alcohol cleaning keyboard keys under the contact with the key cap, after cleaning to test. If the fault continues. Then open the keyboard shell again, replace the button can be the problem.