Windows 7: Toshiba satellite laptop can't detect internet using ethernet cable

hello , i got my laptop back from the repair shop replacing my hard drive.
today i tried to connect it to the internet using ethernet cable , and i have noticed that the ethernet cable is not blinking its lights like it usually do with my desktop pc. And my laptop can't detect it .. how can i fix this problem , my laptop works with this ethernet cable until my laptop hard drive got broken. I currently have windows 7 home premium x32 with 4g ram, quad core and amd a6 vision graphic card

I've got the same problem also with a Toshiba Satellite. I can't detect any wireless network and cannot connect to ethernet cable since I have my laptop formated.
I think it might be because we don't have the network driver installed, though I don't know how we get that.