Monitor goes to sleep when I turn on my computer replaced the monitor replaced the graphic card replaced the cord from the monitor still goes to sleep sometimes it will start but then freezes up then back to sleep out goes

SOURCE: graphic card problem? monitor?

sounds liek graphics card is shoy, i had very similar problem, changing the video card worked a treat, its not a Inno3D is it?

SOURCE: Monitor goes into sleep mode after a few seconds

Recently, my desktop monitor goes into "power safe mode" as soon as the Windows XP logo appears after the POST on my Dell Precision 370. The computer continues to run. I was able to go into safe mode, and all the devices seemed to be active, especially the nVidia graphics driver. The video settings in the BIOS were also correct along with power management settings. I even tried different monitors. At this point, it seemed as though the graphics card might be faulty.

The last suspicion was the graphics driver, so I uninstalled the graphics driver in device manager: Control Panel > System > Hardware > Device Manager, and when I rebooted the computer, I was able to log into Windows normally. When I went to see check the status of the graphics driver in Device manager, I noticed it re-installed the same driver, but this time it installed correctly and I was able to access the nVidia graphics utility.

If the driver does not roll back or re-install automatically, just download the latest recommended or urgent video driver from Dell or whatever mfr while in safe mode w/ networking or on a flash drive, and install the driver in safe mode, reboot and hope for the best.

* If you have any specific or 3rd party display utilities, disable or uninstall the utility in the startup as they may be the cause.

Good luck!

SOURCE: Monitor goes into sleep mode after a few seconds

This is normaly cause by incorrect power management settings.

check power management setting in both windows and your computers bios

you will not need to worry about the power management settings of the bios when an operating system such as windows is loaded.

Loch Hiam
Az.

SOURCE: Dell C521 Where to connect monitor?

This means that you have an external video card (which is not outside the computer). This video card will be plugged into the motherboard. That message is saying that the port on the back of the computer that your monitor is plugged into is the wrong one. You need to look for another port on the back of the computer.

Here is a picture of a VGA port that you should use if you have a VGA cable to connect the monitor (Blue Ends).
http://news.softpedia.com/images/reviews/large/VGA.jpg

Here is a picture of a DVI port that you should use if you have a DVI cable to connect the monitor (White Ends).
http://zedomax.com/blog/wp-content/uploads/2008/09/dvi.jpg

So depending on the cable and connections that are available on your computer and your monitor depends on what you have to use. I hope that wasn't too confusing. Let me know if you need more info.

SOURCE: Monitor goes into Sleep Mode immediatly upon turning on computer

Ok. I think "sleep mode" means that your monitor might not have a tight connection. Tighten all connections. Also, push the power button on your tower. When you gegt back, go to screensaver- power settings- and from there you can adjust.