Could be the lead-free stuff - I dunno.
The simple test for "is it this problem?" is to plug in a USB WiFi dongle.
My "hit rate" so far is 100% for that "fix".
Dunno why the link doesn't work for you, LR. Try this shorter one:
IT Resource Center forums - DV6000 Wireless device vanishes
The problem is indeed extremely well known, although HP Customer Service's first response seems to profess ignorance of it. As soon as you say "There's a thread on the HP forum, I'll send you the link" - they know what it is and send you a box to put it in, followed by a courier to pick it up.