@syedzubair97087 @lanre70 download the Maintenance and Service guide [http://h10032.www1.hp.com/ctg/Manual/c03471180.pdf|from here] Page 120 will tell you how the replace the top cover. On this model you need to replace the top cover, which includes TouchPad, TouchPad cable, TouchPad button board, and TouchPad button board cable. [br]
The part number for computer models equipped with a 15.6-in display assembly and 2-button TouchPad is 613335-001. For models equipped with a 15.6-in display assembly and 4-button TouchPad the part number is 613336-001
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