You would have to order the supported BCM wireless/BT combo card and replace the Ralink model.
You will find the Broadcom wireless/BT card listed in the service manual. Make sure your country is included amongst those listed, or the card won't work.
You need to order that card and it must have the HP part number on it or it will not work.
http://h10032.www1.hp.com/ctg/Manual/c02657339.pdf
Chapter 3, page 24.
Broadcom 4313 802.11b/g/n 1x1 WiFi and 2070 Bluetooth 2.1+EDR Combo HP Part # 600370-001