How to Repair dell inspiron 1721 keyboard by yourself

April 26, 2010 - PRLog -- Keyboard is the most widely used computer input devices, which consist of keys, conductive plastics, as well as the encoder interface circuits so on. When your dell laptop keyboard(http://www.udtek.com/dell_Laptop-Keyboard_csf_3_2a_41.html) doesn’t work, how to repair your dell inspiron 1721 keyboard by yourself?

dell inspiron 1721 keyboard Letters cannot type
For example: the letter D is the knock did not go, no way to use the Dir command, the letters A sporadic.
Tip: Cleaning the dell inspiron 1721 keyboard(http://www.udtek.com/dell-laptop-inspiron-1720-1721-keyboard-p-40488.html) inside.
Steps: shutdown;
Unplug the dell inspiron 1721 keyboard (note that when you unplug the dell inspiron 1721 keyboard iterface on the arrows or “TOP” prompt in order to plug it back);
Reverse dell inspiron 1721 keyboard, Unscrew the screws, open the dell inspiron 1721 keyboard;
Use of alcohol and scrub the dell inspiron 1721 keyboard  keys the following parts in contact with the keycap. Note that if the surface layer of relatively transparent plastic film, please open a post-wash.

The use of a normal mouse, the dell inspiron 1721 keyboard is not available
Sometimes after boot into Win95 mouse can be used, but the dell inspiron 1721 keyboard cannot be used.
Tip: Check the dell inspiron 1721 keyboard interface is loose.
These steps: Use the mouse soft-off Win9x systems. Hard shut down the system to prevent paralysis. Turned off, pull out the dell inspiron 1721 keyboard  interface part of the re-inserted back slightly harder. Be careful not too much strength, so as not to damage part of the dell inspiron 1721 keyboard interface on the motherboard. Boot test.

The dell inspiron 1721 keyboard and mouse cannot use the
Sometimes after boot into Win95 cannot use the mouse, the dell inspiron 1721 keyboard cannot be used.
Tip: system instability. This is the crash performance.
Note: Please remove the unnecessary parts of the system so that the system only motherboard, memory, CPU, graphics card, monitor, dell inspiron 1721 keyboard and hard drive to see whether it crashes, and then verify that each new hardware added after the shutdown, until they found that crash.

The individual keys does not help, change dell inspiron 1721 keyboard fault is still
Total faults computer dell inspiron 1721 keyboard, space bar, N, H, Y, 6, F4, Esc dell inspiron 1721 keyboard often does not help, and sometimes can blind by stretch recovery, for a dell inspiron 1721 keyboard failure remains.
Tip: man-made settings, virus, over clocking.
Steps: to restore the default dell inspiron 1721 keyboard;
Followed by the mouse-click “Control Panel”, “ dell inspiron 1721 keyboard”, “language” and set as default
Value. Check for viruses or re-install the system. Note that the installation process seen in DOS, Win3.2, Win95
On which normal / not normal, re-install is not normal.

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