Keyboard buttons not working (weird problem?)

[crzyice]

Hello,

I have a weird problem with my Microsoft Comfort Curve Keyboard 2000.
Every key works fine except for the Z and the C button. I tried removing the keys and looking under but there is nothing stuck under and it presses fine just like any other buttons.
In some days, the Z and C button will work. On other days it would not.
On the days it would not work, if I hold the Z button for ~1 minute, after that minute it would begin to start working again. (same with the C button).

Does anyone know what is wrong with the keys?
I have tried this on another USB port and the problem is still the same.
I had no problems with the keyboard until a few weeks ago. (owned the keyboard for a year)

Thanks for the help!

 

[inzone]

How old is the keyboard ?

 

[crzyice]

Approximately 1 1/2 years.

From: http://www.amazon.com/Microsoft-Comfort-Curve-Keyboard-2000/dp/B0009ZBRS0/ref=sr_1_1?ie=UTF8&qid=1358367809&sr=8-1&keywords=comfort+curve+2000

Some additional details:
I never spilled water on it and it was working fine until recently (this past month).

 

[inzone]

Underneath all the keys are small contacts that respond to your pressing of the key , if the z and c key are excessivly used then they coould become unresponsive.
However when they test the keys for longevity they usually will last for thousands and thousands of key presses.

A lot of keyboards will come with a warranty and some for up to 3 years , so you may want to check and see if it's still under warranty.

 

[crzyice]

Best answer selected by crzyice.