"Check Signal Cable" error after transporting computer

Yesterday my computer was working fine but since I was moving I had to bubblewrap it, put it into a suitcase and fly abroad with it. Today when I turn it on a "check signal cable" message appears on the monitor/

Ive tried all the different cable connections possible between the computer/monitor but none of them seem to have any effect on the situation.

The Monitor is a Samsung 223BW and the computer has a nvidia 8800 graphics card and intel quad core cpu. (sorry thats all i remember/can check)

Any ideas what could be not working?
 
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