I have a sony vaio laptop that worked real well hooked up to my TV via hdmi cable. Now it does not work. I have pushed fn+f7 it doesn't work anymore. Please help

Check the connections and start over.

Take out the cable and switch the laptop off then on.

Still doesn't work, switch it off, take out the battery + power cable. Now press and hold the power button for about 20sec.

Try again.

Cheers
Grant