Trouble Connecting Laptop To TV Usin VGA Cable

Hi there,

I've just tried to connect my old Toshiba Satellite laptop to my tv using a VGA cable. Upon start up the tv recognizes the laptop as its main screen then, after loading loses signal. The problem I'm facing is that my laptop screen is completely broken so I am blindly attempting to correct the issue using any suggestions I've found online by way of key shortcuts, including changing the resolution. So far, no luck.

Any suggestions?

Thanks!