Video card on RedHat 7.3

--- I installed RedHat 7.3, but informed the wrong video card.
As it is configured to boot in graphical mode does not work.
The screen blinks all the time, not giving option to enter text mode, to configure it properly.
anyone know how to solve this --- I try

ctrl alt f2 or f1 likely you will fall in text mode.

--- It did not work! Someone else has another solution
Thanks!
Emanuel
---
worked using Ctl Alt Esc
Thank you for willingness to help!

Emanuel
---
adding
when you start the graphical lilo you press ctrl x
and goes to boot in text mode then eh soh enter the single mode! ---

Is a mass to kill the kdm so that he can test the new config .. followed by a startx.
Or go back to the terminal where it is likely startada (usually alt F7) and give a ctrl backspace .. Ai
forehead
hugs hours without reboot