Sony Vaio - Wireless network problem!

Hi... Have a sony vaio, working perfectly last night before I switched it off. Turned it on this morning and it would not find our wireless network. We have two other laptops in the house and both found and connected straight away....
I have to admit that the laptop was put down with a bump this morning and I am wondering if it has popped out or broke.
Does anyone have any ideas please.

Does the network not show up at all in the available networks, or is it just not connecting automatically?

It does not sure up as available.

Your wireless network card might have popped loose, as you suspect. Hopefully that's all it is, and nothing cracked.