what are you running
video card
cpu
m/board
ram
power supply
brand
wattage
check the listings in the bios for voltages and temperatures and post them
can you try your monitor on another computer
try a new video cable from the card to the monitor
for the psu details you will have to take the side off and look at he label on the power supply
if you don't know what is inside use this program
but just post the information requested not the whole log
http://www.cpuid.com/pcwizard.php
video card
cpu
m/board
ram
power supply
brand
wattage
check the listings in the bios for voltages and temperatures and post them
can you try your monitor on another computer
try a new video cable from the card to the monitor
for the psu details you will have to take the side off and look at he label on the power supply
if you don't know what is inside use this program
but just post the information requested not the whole log
http://www.cpuid.com/pcwizard.php