HP India — keys are not working

Address:

211009

We have purchased hp make laptop vide sl no. Cnd434530h, product no. J7v52pa on august, 14 through our supplier m/s ge t & d (Alstom). Now we required to use the said laptop in our sas system. When we open and check the laptop, we observed that some keys (Button) are not working like brightness key, wi-fi key, volume keys etc. Kindly do the needful.