Sigmachip Keyboard is not functioning on Tablet I have an new Tablet Micromax P681 and Sigmachip Micro USB keyboard but it is not functioning, what can be the issue, please help
Dude check the stripe underneath keyboard. 

I had the same problem, at morning a tablet keyboard case was delivered home after connecting to tab input keyboard was detected as Sigmachip Micro USB keyboard but I was unable to get any key like "B" "R" "T" "P" etc. so I open up the case &amp; notice there was strip underneath the keyboard (strip is located just below those keyboard leds in front be very careful while opening the front side of keyboard you might tear a part those strip by profession I open such items regularly) which was not connected properly I reconnected the strip now my keyboard is operational. Open your case in a clean way so that even when you fix it to after.

But I am still going to replace my product as few keys are not working at all, from customer point of view I didn't buy that product to fix it by my self.