Nvidia Quadro boot hangs

Hello everyone I have a Linux box (Scientific Linux 64 bit) with a Nvidia Quadro 4000 grafx board.
Nvidia driver NVIDIA-Linux-x86_64-310.40 installed correctly.
If the PC is started during boot of the Linux text console the display hangs claiming “no signal” and at the end of the text mode if Xorg is started the display works ok and Xorg is displayed.
But, if I start the PC in text mode only the display hangs, and if I connect via ssh from another PC and I issue the command:
/usr/bin/nvidia-smi -L

the monitor starts displaying the login prompt then goes away again after few seconds, What happens when the nvidia-smi command is issued? why does the monitor hangs? in Xorg mode works ok, why doesn’t in text mode? how does Nvidia drivers goes along with fbcon?
Any help?

Do you mean you can see the system BIOS boot screens and part of the kernel startup messages, but that the screen goes blank during kernel initialization? Is your system configured to use a plain text console, or a VGA console? You said you’re using fbcon: does it work if you disable that? Is nouveau properly disabled?

Running nvidia-smi -L initializes the GPU and then disables it again.