I have a Sony Vaio with Nvidia graphics card and is connected to an Acer LCD monitor with RGB cable. I've tried to change refresh rate but I can't select more than 60 Hz so the image in the monitor blinks.
The extrange thing is that the fisrt day I started the laptop, I could see 75 Hz and all went ok. But now, I only can see 59 and 60 Hz.
Is there any option in the registry can I change or any other possibility?