Pc:
evga geforce 7950 gt ko 512 graphic card
500 w ultra POWER supply
msi ms-7185 pci-e sli ready mother board
athalon 6400 processor
western digital 500gb hd

Ok i know this sounds like an easy solution but hear me out. I hit the power button Fans turn on lights are on but no beeps, cd drive wont open i get a check cable signal. I replaced the power supply (another 500 w ultra) and tried again, didnt help. I then replaced the VIDEO card (another evga geforce 7950 gt ko) and no help. i have no other monitor to test it on. I dont know what ELSE to do, can someone help? thank you.Check connections. yes sir i have, everythin is in seat well.The monitor is KNOWN to work? im not sure.... i never tested anything. im gunna see what i can do to see if the monitor WORKS.. Hook it to another computer. You'll know soon enough.Well i decided to take it to a comp store and so far we have eliminated plent of things now its down to the motherboard and the cpu... I suppose that's the quick way of doing things.  thank you for your help raptor.Come back anytime.