G550 and blank screen

[Tellu]

After putting the matrox to motherboard and starting the computer, monitor did not turn on. I have editing bios just like they adviced in matrox website (except "assign irq to vga" because there is no such optionin my bios) but it did not help.

My Computer:
AMD Athlon 700MHz
Asus K7M
Win XP

[The PIT]

Any bleeping at all. Have you checked that the card is seated properly?

[Tellu]

No beeping.
I have checked that it is properly installed.

[Greebe]

Have you tried using the other head just to see if it was outputing there?