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7,8,9,0, keys stopped working

\015 Keys 7,8,9,0, stopped working\015

Answers :

..you can open your keyboard from the back of it..those little screw..un-screw them..then..carefully open it..you can see plastic board there..actually 2 pcs..just clean it with a dry paint brush to clean off dust..or you can wipe it gently with a wet cloth or wiper sheet...get ride any dust or dirt specially on those numbers..then gently put all things back..if this doesnt solve your problem..try changing your keyboard coz it may be broken already...key board are usually dispossable..hope i contribute something here..
7,8,9,0 --- well, taking it apart and cleaning it may very well do the trick.
\015\012do you know who spilled the orange juice (or similar sticky-when-dry) fluid on your keyboard? Most likely no one will 'fess up.
\015\012So, contact cleaner might help, but I think that a little carefully applied soap and water may do the trick better.
\015\012Naturally you want to be sure the cord is disconnected from the keyboard -- you won't get shocked, but you are trying to solve the problem, not create more.
\015\012If you can pop the keys off without causing damage you may be better able to clean it.
\015\012You can even get more aggressive with the soap and water if you wish, just as long as you be sure it is dried thoroughly before using it again.
\015\012A hair dryer would help to dry the unit, but DON'T USE THE HEAT on the air dryer, you only want an airflow.
\015\012If you have any doubts as to whether or not is is dry, let it sit for a day or so over the air conditioning vent.
\015\012If it is not something gumming up the works, and the problem is indeed electrical the unit is scrap. With four consecutive numbers out it sounds like a spill or a chip to me.
\015\012good luck
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