So I have bought a refurb 17" MBP from the Apple store. Configured at it work with no problems - brought it home and logged onto my home wireless network no problems - first night. Turned it on yesterday - and a dialogue box came up "None of your preferred networks are available" - "a WEP pass code is required". So I put in the network passcode (even though I've already done this and previously saved it) and it keeps failing to connect and saying "connection timeout". Anyway eventually it connects and works OK for a while - however when it goes into sleep mode it loses the connection again and again I struggle to get it to connect. I ended up switching it off in frustration. So tonight - same thing - keep trying to connect - keep getting the "connection timeout" message??? Eventually I get it to connect - so it's as if it's only connecting 1 time in 20 ??? I never have any other problems with any of my other devices on my home network (a Netgear DG834GT v3 router) - including my iPad, iPhone 4's, and MBP13" - as well as various PC's etc. NEVER! So why is it that it's just this new 17" thats having the problem??? Is it broken ...could this be why it was in the refurb store??? Any suggestions or thoughts? Thanks!