iMac WiFi/WPA Invalid Password Issue

Hello,

I've never gone on any forums/blogs before but recently started having what I consider to be a serious issue. I've had my iMac for 2 years now and went from living at home (with MULTIPLE computers) to living alone with only one. I never ever had any issues until this past Friday.

I used my iMac (Version 10.5.8) on Thursday night without problems. I didn't use it at all on Friday and Saturday morning, I went to use it and I noticed I couldn't connect for whatever reason. I've seen this before so i really thought nothing of it. Let it be and figured it would be fine later.

At the same time, I began to prepare a family member's laptop for reimaging. It's never been to my house before so I cleaned up what I could on it and decided to connect it to my network to see how the internet functioned. While I connected it, I tried to go on I.E. and noticed it wouldn't connect, but I by FAR did not associate the two. I finished what I was doing (didn't actually get to reimaging) and then later that day (yesterday) I tried to go back on and realized no matter what I did I couldn't reconnect.

It asked me for my WPA Password which has NEVER been changed since I purchased the computer. I re-entered it about a dozen times. It said nothing but "INVALID PASSWORD". There is NO way this pw is invalid. I have NEVER changed it.

After reading some stuff on this forum, I tried several things that just didn't work. I turned OFF the laptop and initially, instead of telling me my pw was invalid, it told me "Connection Timeout", but that only lasted for one reboot and then it was back to "Invalid Password".

There is NO reason this shouldn't work. It makes no sense and is mind boggling while driving me INSANE!! How could it work everyday, perfectly for 2 1/2 years and then poof just up and not work anymore? My PW is NOT wrong. The airport connected just fine to a few people in my building who aren't protected (how I'm using this forum now). I've never had issues in my building at all until today.

Can anyone help? Offer any kind of assistance? Sorry for length but i feel to help, you should everything.

Thanks

 

I did start to wonder that? But, I know nothing about this stuff. Ughh...(female lol)... Do you think I may need a replacement??