Keyboard keys not working

Recently I faced an issue with my laptop keyboard. Some of the keys are not working.
As it is still under warranty, I thought of replacing the keyboard.
When I contacted customer support, after listening to the problem he asked whether I tried DRAINING.
Then he explained me the procedure, and guess what - it's working perfectly again.

Here is the procedure of DRAINING:

• First shut down the laptop/notebook
• Remove the battery
• Also unplug the adapter
• Now press and hold the power button for about 25-30 seconds
• Insert the battery again
• Now power on the laptop by pressing power button(normal booting)

Now your keyboard will work again normally.
If the problem still persists, consider replacing the keyboard.