Tweaked Refresh rates and Crashed

[Thangsang]

 

It's not Mac's fault. I've been using it for quite some time without any problems but after I've changed the display settings with a different refresh rate, it no longer can log in. It stops at the blue screen.

 

I know that my display adaptor doesn't support refresh rates, but with a third party software (Display Hz) I've chosen to use refresh rates supported by my display. After restart, it refuses simply because the display can't display. I've tried with -x"Graphics Mode"="1024x768x32" also but still it fails.

 

I was wondering if there is a way to change the login process just like in Windows XP and repair it. I tried booting in safe mode (-x) but that too stuck at the same point.

 

Your valuable suggestions will be highly appreciated..