Acer keyboard, some keys, such as the space bar, Enter key does not work, sometimes, adjustment shall be entered many times before - one or two characters, and some keys, such as the up cursor key is pressed is no longer on the screen cursor continuous movement, this time Acer keyboard input other characters can not be required to press in order to bounce.
This failure of the keyboard "key card" failure, not just the old keyboard to use for a long time, some did not take long for a new keyboard, the keyboard's card key failure is also sometimes occur. A keyboard key card phenomenon caused by the following two reasons: one reason is the following keycap insert column position offset, making the keycap is pressed and the key is not stuck in the body shell caused by the bounce card key, For this reason occurred in or near the new keyboard on the keyboard. Another reason is the key long-term use, the return spring elasticity becomes poor, shrapnel and the press rod friction becomes larger than the key card, key bounce caused by such reasons occurred in long-term use of the keyboard. When the keyboard appears when the card key fault can be allocated under the keycap, and then press the press bar. If the bombs do not lever up or by fatigue, is caused by the second, otherwise the first cause. As the keycap if stuck with the key causes the body shell "key card" failure, you can key in the keycap and put a gasket between the body, some of the gasket can be slightly harder plastic (such as discarded floppy disk jacket) made, its size is equal to or slightly larger than the key body size, and in the open position by a rod through the rod allows free passage of ammonium square hole, it sets in at pole, plug in the keycap; use this pad body with the key piece to prevent keycap stuck, you can fix problems button; if the spring because of fatigue, the resistance becomes large shrapnel card key causes failure, then the body can be special key to open, a little tension return spring to restore elasticity; remove the shrapnel will be key to body recovery. By removing the shrapnel and reduce bounce by the resistance rod, so that key failure has been restored.
Acer laptop keyboard can not enter the reason: some characters can not enter.
If only one key character can not enter, it may be the key failure or joints Weld. Inspection, in accordance with the method described above to open the keyboard, contacts with a multimeter measuring the resistance profile of on-off state. If the key does not always turn on when pressed, then button reed fatigue or bad, in need of repair or replacement; if the button is pressed off normal contacts, indicating that may be due to cold solder joint, sealing off the hole gold dust or oxidation To be measured along the printing line, paragraph by paragraph, identify failure to re-weld; Ruoyin metal hole oxidation and void oxide layer can be cleaned and re-weld; off completely if the hole caused by the metal circuit, it can also plus welding wire to connect.
Acer laptop keyboard can not enter two reasons: if more than one not in the same column, not the keys on the same line can not enter.
May be somewhere in the column line or row line circuit, or logic gates may have problems. High-frequency oscilloscope 100MHz available at this time to detect, identify failure device Weld point, and then repair it.
Acer laptop keyboard can not enter three reasons: keyboard input and screen display of the characters are inconsistent.
Such failure may be due to short circuit the circuit board caused by the phenomenon, its performance is shown by the key is the same as the other characters, this time can be measured multimeter or oscilloscope to determine the point of failure after the repair.
Laptop keyboard can not enter a reason five: Press a button produces a string of multiple characters, or when the character key bounce.
This phenomenon is caused by the logic circuit fault. First select a column of characters, if the enter key of a row without a column, may produce the phenomenon of a number of other characters; if the one with the Enter key, will have a bounce and can not be the last character of the phenomenon into the system, Check logic circuit chip with an oscilloscope to find fault with the model after the replacement of the chip's new chip, troubleshooting.
Acer laptop keyboard can not enter a reason four: drive may be damaged or caused by sealing off the keyboard and motherboard.
Use an external USB keyboard into the system, in the device manager to see your keyboard equipment. Right-click "My Computer" - Manage - Device Manager. In the right column to find the "keyboard" and "Human Input Devices", unplug your USB keyboard to determine which is the keyboard that comes with your notebook, remove the rest of the device, restart the computer will automatically install the driver later. If the driver can not be installed, use the installation CD-ROM drive with the notebook. If you can not install, compared to hardware failure.
If the device manager does not own the laptop keyboard, compared with physical failure, it is recommended to send professional maintenance.
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