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You just spilled some sweet liquid that messed up your keyboard - coffee, coca cola, milk. Try to clean using technical alcoohol. Before THAT REMOVE BATTERY. ALLOW TO DRY. If problem persist have it done in service. Post results here please !
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If a key on a laptop keyboard stops working it's usually bad news for the keyboard as it may well need to be replaced. Test the 'feel' of the button. Does it feel different compared to other buttons when you press it? I.e. does it feel loose, stiff, wobbly or like it sticks? Stiff or sticky could mean there is something stuck under the button, loose or wobbly could mean it is mechanically broken. Sometimes turning your laptop on it's side and tapping it firmly, not hard, can release it if there is a mechanical fault. Unfortunately however I think the fault is most likely to be an unrepairable one. You could always plug in an external USB keyboard to check if it the G key responds just to rule out an operating system fault but it is unlikely to be that. If the G button works when using the external keyboard you can be sure it is your laptop keyboard that is broken.
Replacement keyboards cost around $30 (eBay). There's a good guide on youtube showing how to remove the keyboard. http://youtu.be/OOor4uZRM9g
On your keyboard:
Press the Windows key.
Use the keyboard arrows to navigate to the My Computer icon, and to highlight it.
Press the Enter key.
Press the Tab key, repeatedly, to highlight the icon for the CD-drive.
Look on the bottom-right of your keyboard:
SPACEBAR, ALT, WINDOWS, other, CTRL
Press that "other" key.
Use the keyboard arrows to highlight EJECT.
Press Enter to "open" the CD-drive, and to "eject" the CD.
These keys share a scan line in the keyboard. There is a break in the scan line or a bad connection between the keyboard panel and the controller circuit board inside the keyboard (or the motherboard in a laptop computer). Most keyboards use a pair of flexible plastic sheets with the scan lines printed in silver ink. These are attached to the controller with a "flexible printed circuit" connector. Sometimes the material tarnishes where it makes its connections there and the keyboard fails as you have described.
Most of these connectors have a friction lock that is disengaged by sliding it about 1 mm along the length of the flat ribbon cable going into the connector (there is a stop at this point - do not force the lock past it). The lock looks like a frame around the top of the connector box and has a slot for the cable. Once the lock is disengaged, the cable will slide out. Now you can clean the contacts on the cable (both sides) by polishing them with a white pencil eraser. When that is done, seat the cable back in the connector and push the lock back in until it makes a soft click or bottoms out on the connector shell. Once in a while there will be a connector that is friction fit - there will be no lock, but the cable will have a stiff reinforcing sheet attached to it. Very rarely, the lock will be a flip-up tab on the side of the connector - these are usually used only on smaller, narrower ribbons.
Avoid touching the circuitry on the controller board - it is easily damaged by static electricity.
If this doesn't work, you'll probably have to replace the keyboard.
Well completely removing the keyboard wont really help, seeing as how there is an underlay board it rest on. Also you risk voiding any type of warranty by doing so.
So I'm assuming coke or some other type of drink or sticky substance is making the keys stiff.
Best advise to you is to manually take a small knife..or butter knife would be safer and lifting up each key very carefully till it pops off. If you are careful there should be no worries and you can clean the board under the keys the best you can...(DO NOT OPENLY POOR WATER OR CLEANING SOLUTION) take a rag or a towel, lightly moisturize it and clean or wipe carefully.
Then just re-seat the keys back to the board as the springs and or latches under the keys should just snap back into place.
Remember where the keys go also, or typing could get interesting for you if you look at the keyboard.
I myself ...do not even glace at the keyboard anymore :P
Hi, Had the same problem. Get a pointy knife & run it up & down between the keys. You will be amazed at the RUBBISH that comes out. Then hold it upside down, & with a stiff bristled brush, clean out the rest of the RUBBISH over a sheet of newspaper. Regards, L
I think you need to open and check, if its stuck somewhere just do the handwork(adjust until its ok), or replace the keyboard, its not really a pro jobs and you can do it yourself. To get the guide to open and and replace your keyboard you can read here: http://eshop.macsales.com/Tech/FTP/pbpismo/pbfw-kybd-cip.pdf
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