No Signal on monitor

[Aramax]

Hey Guys!
I have a computer which is 4 years old. I know its time to buy a new one but i'm happy with my computer and i get my work done. Although i'm planning a PC for gaming.. But this computer started acting weird... Science two days i can't start my computer. The CPU beeps like normal and everything even windows welcome sound is heard but there is no display on my monitor. It all the time tell me "No Signal" Help Guys!

[FaMe FacToR]

Hey!
Start by stripping the system to only keyboard mouse and monitor. unplug drives... Remove all but one ram chip if you have multiple ram chips. Remove all cards exept the video card and try it again.... See what do you get!?

[SmirnOFF]

Hey!
Someone may have changed the default video card to something else, probably the on-board video. If there isn't on-board video then try switching the monitor to whatever other video card there is. If that doesn't work. Turn of the CPU and unplug it, then take out the cmos battery and put it back in. You could always try to move your ram to a different slot . The system is receiving power and the CPU fan spins. correct?

[Rudra.J]

Hey!
Check the VGA cable that goes to the CPU from the monitor. If it is rightly connected. Then try to check the monitor with some other machine. If this works, boot your computer in safe mode and change the display settings...! Then reboot your computer and start is normal mode..! All the best...!