Unsupported signal please check the device output sony bravia

MikeH_78

Honorable
May 27, 2012
1
0
10,510
I have an old Dell Inspiron 2650 laptop. I also have a Sony Bravia KDL-32BX310 digital TV. I have connected the TV and the computer via a RGB cable. I tried to use the TV screen as a dual monitor. When the computer starts up, it shows up on the TV screen. But once it get to the screen where I have to punch in the password to log in the computer, the TV screen goes blank with the message on the right bottom corner saying, "Unsupported signal. Please check the device output signal". What does that mean? How can I solve this problem. Thanks.