Wifi not working for Compaq 6720s

I have tried below steps to start wifi on my laptop. But its not working. pls suggest. 1) All power buttons are on (laptop and adopter).2) I think Wifi adapter not visible in network adapters. Screen shot attached. 3) Tried all network drivers available on hp website. no one is able to restore wifi.4) Cable LAN working fine. Wifi was chrashed itself during internet use. So I thing, Laptop's wifi card has broken. pls advise on this.  Thanks,VIkky 

Hi: I agree that something has happened to the wireless card if it was working fine and then just disappeared. Go into the BIOS and make sure the wireless card is enabled and present. If it says not present, then the card has died or maybe the contacts have become oxidized. You can try removing and reseating the wireless card.  Slide it in and out of the contacts a couple of times. If you can do it without removing the antenna leads, that will make things easier. Did you install the HP wireless assistant?  If not, install that and see if you can use the software to turn the wireless card on. http://h20566.www2.hp.com/hpsc/swd/public/detail?sp4ts.oid=3357379&swItemId=ob_76368_1&swEnvOid=4053 If nothing works, the wireless card is no good anymore. 

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