HCL NOTEBOOK P21 PDC
Some of the keys in keyboard are not working

The keys of the left side of the keyboard (e.g. A, S, Q, W etc) and the function keys are not working.

Please let me know how to resolve this issue since this product is under warranty.

The product details are:

Model no. AX0P2115

Serial no. 9074AX111727

Warranty card no. 10196496