I hope someone else can help cause I'm rather clueless regarding his problem, not to mention inexperienced. According to him, he has been able to connect to the Internet wirelessly before his computer was fixed. His laptop can connect to the Internet when wired. That rules out the proxy settings.
Please go to the device manager and see if your wireless network adapter has been installed.
To do this, click Start then right click on My Computer->Properties. Select the Hardware tab then click Device Manager. Click the + sign on the left side beside network adapters. Your wireless adapter's status should be there, indicated by the presence or absence of a red X. Try updating it as well.
You're wireless adapter's IP settings may also be the problem. Please refer here (post 8 and 9 specifically) to see how to set IP assignment to automatic.
Your issues in wireless might also be caused by incorrect wireless configuration like SSID, wep key, index, etc. Log in to your router's admin page to see the wireless settings and verify that your laptop is configured correctly as well.
Hope that helps
Edited by ditrackster, 15 May 2008 - 07:54 PM.