Can't connect to Wi-fi after replacement.

To me this sounds like you haven't got the correct drivers for your computer? Have you tried updating the drivers? follow these steps to check your wireless adapters:

Start - type "Device manager" in search all programmes - click on device manager - view your network adapters - select the wireless driver - click update driver (Located on top with green arrow".

These steps should work, if they have can you please score and accept my answer.