Try this keyboard on another PC and another keyboard on this PC.
I have a very frustrating problem.
For a while now the "a" key on my keyboard has been sticky. When I push it down, the key itself will stick (though it will still only input "a" once). I tried popping they key off and cleaning the area and the key itself with alcohol and a q-tip, but it didn't do anything. Then I thought maybe cleaning the surrounding keys might help, so I popped off the "a," "q," and "s" keys and cleaned them and their surrounding areas. I popped the "a" key back in and it seemed to work fine, no sticking. I thought the problem was solved, but once I popped the q key back in the a key started getting stuck again, which is odd given the keys don't even appear to touch when the "a" key is stuck...then I tried to put the "s" key back in and had some difficulty for some reason. I took care not to force it in, but once I finally got it back in it started sticking even worse than the "a" key! The "a" key could be unstuck by just jostling the keyboard a little, but this doesn't work with the "s" key; I need to actually pry it back up. Also, the "s" key actually will get stuck inputting "s" repeatedly, unlike the "a" key. I now believe the problem has something to do with the keys themselves; the little plastic mechanisms on the back that fit them into the keyboard.
What is going on? How do I fix this??? Do I need to buy a new keyboard? =(
btw, I'm not sure exactly what keyboard I have...it'a a gaming keyboard with "gamer" on the bottom, and the keys are backlit by your choice of one of three different colored lights (purple, red, or blue). You can cycle through them by holding the Fn key and hitting the SL key (above the six key grouping that contains Del, End, Ins, etc.)