32" TV not working as monitor

[mixed]

I have a 32" TCL flat screen TV which I've connected computers to in the past (both notebook and desktop). At the moment I'm just an 'unsupported' message on the screen when I try to connect. I've tried playing with the resolution, but it doesn't help. Any suggestions?

[Crossy]

It will be a scan rate problem, if you're running it as a second monitor right click on the desktop of the working screen, choose the TV from the list and pick the recommended resolution.

[phazey]

+1 Refresh rate. You're computer is probably set to 60hz, and your TV is something funky like 59.6hz.

[BB1950]

Agreed, it's the refresh rate. All my 32" TCL LED TV's (3 of them) use 1280x720 as the recommended resolution with 60Hz refresh rate. In Windows 7 you set the refresh rate by clicking on the advanced settings in the resolution screen. Under the monitor tab is a dropdown box to change the refresh rate.

Edited March 10, 2014 by BB1950

[mixed]

Thank you all for the help, it was the resolution and refresh rate, fixed now.