AirPort card not installed and other odd behaviour

Sorry for the long post, just want to provide all relevant info.
I have a first gen intel mac book pro 15" that has been working fine from the day I got it (well except for the optical drive, but that's another story) and today it decided to start playing up.
I've tried numerous things after googling around without success. I would greatly appreciate if anyone could help me find a solution.
When I woke it from sleep by opening the lid today, it wouldn't connect to the wireless network so I clicked on the airport button in the menu and there appeared the message "No AirPort" card installed". Then I noticed that the volume button next to the AirPort button was also greyed out so I looked at Sound preferences and there appeared the message "No output devices found". Sometimes the screen would not turn on after waking from sleep so I tried connecting the laptop to my TV (no other monitor around) to see I could get a picture without success.
After a restart or two, the computer would sometimes not boot – the LED light at the front of the laptop would light up but the computer would not load. A couple of restarts by holding the power button down later, the computer would start.
At one point, when I hooked up the power adapter while logged in, the screen turned off. I had to restart the computer a few times to get it to work again (both with the power hooked up and when running on battery).
I did some googling and tried a number of things to try to resolve the issue without success. I tried the following:
- deleted the /Library/Preferences/SystemConfiguration folder. Apparently OSX gets confused with network adaptors sometimes.
- repaired disk permissions
- reset the NVRAM
- reset the SMC
- reset the PMU
- tried running the hardware tests from the Snow Leopard DVD but my optical drive decided not to accept the DVD when attempting to boot from it (ie. holding the D button) even though it reads the DVD fine from within OSX.
- i even booted OSX in verbose mode (cmd-V) to see if i could spot anything – didn't notice anything obvious.
Not sure if this has anything to do with these issues, but I recently replaced my power adapter with a new one after the original one stopped working. I got the new style 85W power adapters after talking to the MyMac sales guy about which one suits my laptop. Looks like the cable got damaged over the years.
Short of replacing the PVRAM battery in case it helps (apparently they last around 5 years), is there anything else anyone can suggest I try? or provide insight into the problem?
Any help is much appreciated.

Thanks for your suggestion.
One thing I forgot to mention was that I have a Bootcamp partition with Windows 7 and when I boot into Windows 7, the wifi and sound also do not work.
Do you think it is an OS X software problem if I'm having issues when booting into Windows 7?

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Your running snow leopard which may be the case. Probably not but i recommend doing a clean install of snow leopard if the problem perrsists.
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least ten seconds, until the Apple logo appears.
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- iOS: Recommended settings for Wi-Fi routers and access points
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Message was edited by: Michael Sastre

I know that fella User — he's always messing things up! I'm glad you got the better of him this time.

AirPort card not installed and other odd behaviour

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