Public wireless network connection issues on laptop

I have an Acer Aspire 5315 laptop with Windows 7 32bit Home Premium Edition 1GB RAM. i had to take it apart to replace the dc port in it last week and then also had to replace the ac adapter as well. Now that i have it back together and everything works it won't connect to the wireless internet. I don't have my own internet currently so i tried various public access points. It will detect a network (though no signal) but won't connect even though everyone else can connect. I'm using a desktop at the public library currently. All my drivers are updated and it says everything is working properly. It's a Broadband 802.11g wireless network adapter. ok, change that from won't connect to EXTREMELY low signal. i'm right next to the router and have 1 bar for a signal and it connected. Any ideas what's going on with my signal issues?

Did you reconnect the black and white wireless antennas on the network card?

no. lol. that was the problem. got to love the simple things. haha

Great! It's nice when the fix is easy for a change!