CRT display flickers, TFT doesn't; why?

[Stefan21]

Hi!

I use a Laptop with an NVIDA Geforce Go 7600 and the original driver on an WinXP SP2.
When I use the external display output cable, my CRT display flickers, but my TFT work properly. I now that the CRT display supports 1280x768px with 60Hz, but when I connect it with the Laptop it even flickers when I use 800x600 60Hz and 16 bit colour depth.

Do anyone know what I have to change or what I can try?

thx
Stefan

[Broni]

I'd set refresh rate to at least 75MHz (17"), or even 85MHz (19"), if possible.