Trouble shooting questions: (Laugh if you want, but these things do happen!)
1) Is the monitor plugged in to the wall and computer?
2) Is the monitor turned on?
3) Have you checked for bent pins on the monitor?
4) Does the computer work with another monitor?
5) Have you shut off the power and waited a while? (I have a video card that cannot handle reboots. I don't know why, it just can't.)

Back to basics.

Remove or disconnect everything except:

Processor and heatsink/fan
1 RAM module
Display card (and the monitor of course )

Get the system completing POST with just that, and then connect up other components one by one, checking to see that it still completes POST.

Connect up the hard drive last if Windows is already installed on it.

hi...my computer is no display...when i tured on...it appears.......safe test..monitor is working...3 color is appears...help me...

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Just three days ago i used my pc betterly, but now it had a problem. When i start it then no screen was appeared. I checked ram, graphics card, & also monitor plug. There was no problem. I don't know what from the problem appear. If any one help me about that matter then i'll be thanksfull to him/her.

monitor wont connect. Message says cable unpluged but it is on. Used to go ok.

A component in the computer (such as a graphics card) may have overheated. In older computers, the fans were very powerful (remember the loud computers of yesteryears?). Now the manufacturers assume that computers sit in air-conditioned comfort all day. So they have reduced the power of these fans that are used to cool the hardware. Follow these procedures to see if that is the problem.

a. Shut down your computer and monitor.
b. Turn on the air-conditioning and install an additional fan in the room if possible
c. After a pause of 15 – 30 minutes, restart the monitor and then the computer.
d. If it was a problem of overheating, the computer screen should now show the system booting normally.

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Its so simple just try putting external graphics card.. whether it is compatible of an AGP or PCI slot.. but I think computer nowadays has an AGP slot in it, so there you go, after installing the VGA card, try turning it on, and wait for result.

my pc give noise when i turn on it when i press the rams it will off but give no display on monitor