No monitor signal

make sure pc is off ,make sure video card is seated properly if it is try resetting cmos there is 3-pin jumper ususlly by battery and usually says reset cmos by it I have seen many differences according to mobo this can also be accomplished by taking out the mobo battery (the little round silver battery) if you have jumper take off 2 pins its on know put on other 2 for 1min then put back turn on, if removing battery take out then turn on pc