I built a pc which as got sli mother board in side all part's are new hard drive cd rom floppy but for some reason it will not boot up and all it keep's saying is no signal THINK IT IS THE GRAPHIC'S CARD BUT NOT SURE AND SOME ONE PLZ TELL ME ANY OTHER ALLY WAY'S I COULD LOOK DOWN THANK'S JASE;-(

Do you get any beeps when the pc starts up?
if your getting a message on your monitor, is the monitor lead connected properly?

The monitor lead is fine, it works on my other PC perfectly

hi people i have found out it is not the graphic card not the ram and i have even put another psu in still no joy no signal still or beep's it just will not boot up plz can anyone help me before my head pop's. THANK'S JASE :-()

has the motherboard got on board graphics? if ther emobo is ok yiu should get some beeps to help identify the problem

There is no on board graphic's . me not sure what you mean by mobo plz tell jase

Is the video card the newer ones for the AGP slot (brown)? Try installing a regular PCI card. If that does not work, recheck all your motherboard connections and measure your power suppy outputs. If all that is ok, I suspect your motherboard is bad. Had the same problem recently.

A good check for the MB being bad/dead is the green PWR lighton the motherboard. IF that comes on the MB is getting power, if not, then its probably the ATX connector on the MB. Also check to see if the processor is heating up. If not, you hae either a dead MB or dead processor.

All the fans work, everything seems to be getting power, the green LED light on the MB is lit up, It isn't a AGP card it is the Nvidia 6800 XFX GT 256 MB PCI express card. How would I measure the Power Supply Outputs? On a friends PC the graphics card was running at 11.45v. I also have the 550 w PSU. Gold plated with a red fan. Another thing is all my coloured fans are not lit up when I thought they should be. Also it doesn't detect my keyboard or my mouse as the lights on them do not light up. I can't hear the Hard Drive powering up, but the CD rom is getting power and the power and restart work.

No response from the KB or Mouse, are they USB or PS/2? I think from what you are describing is either a Dead MB or a Dead Processor and the MB would be my first guess.