just had laptop worked on, now internet is slow; connection? (laptops, hard drive)

[belovenow]

I recently had one of my family's laptops worked on (the power plug jack had come loose from the motherboard, so I sent it out minus the hard drive to have it repaired by a 3rd party company which specializes in this repair for the laptop - an IBM Thinkpad). Well it has come back (the jack is repaired *cheer*) but switching the hard drive back into it I noticed that the wireless broadband connection has abyssmal speed.

I happen to have another fully functional computer available simultaneously and its speed is fine. Just for the heck of it I ran all sorts of speed-optimizers on the repaired machine and they had no effect. Then I switched the hard drive back a back-up machine and the connection speed is fast again as well. So I am thinking the problem is a hardware issue with the repaired machine but haven't a clue about how to diagnose and solve the issue. Could the integrated broadband card have been damaged while the system was being worked on? Any ideas or advice?

[Tek_Freek]

Long shot: Check the Available Wireless Networks and make sure the repaired laptop is connecting to the same one the others are. If your picking up one from a neighbor the signal might be weak.

Also: Right click the wireless icon in Network Connections and click on Properties. Click Configure next to the Connect using: box. Click on the Advanced tab.

Check
Rate = Use Best Rate
Roaming = Default
RTS Threshold = Mine is 2347, yours may need to be different. Try Googling it.

Also check that the Channel Number is the same as your other wireless connections.