Video not supported

[skenny]

Hello,
I am trying to connect laptop to t.v. to play just karaoke. Im using 15 pin male cable into laptop with 3 phono plugs on the other end red blue and green to t.v. 52 in philips ext 4.

when i turn on tele says video not supported. what can I do? please help

 

[Ubrales]

The RGB input on the TV is probably for a VCR or DVD player.

Is there any other input for the TV? Like VGA or HDMI?