what to do

what os do you have win me and xp both have the restore where you can go back to a time when every thing did work also running a scan disk and defrag can fix alot you can try refeshing the os install it again over the old istall so you dont loose any thing one of these thing should work if every thing work before give it a try good luck

You might try changing (slowing down)the refresh rate on your monitor. This is usually done in the advanced display settings.

Are you even getting to Windows or is it dying at the POST? If your monitor is fairly new and has the digital control panel, check your monitors manual to do a "recall" or "reset". This will set your monitors functions back to the factory set "safe"defaults. Is the monitor a standard VESA style or are you using coax or other components. When all else fails, try and get some other cables to see if it might be a cable issue.

As a last resort, go to the CMOS settings and use the factory safe defaults to reset the CMOS. This might slow down performance somewhat, but it will set up the box with a set of safe settings that should be fully compatible with most devices.

Try a different Power supply if you access to one.

Boot up into safe mode and check the resolution of your video card. If it is to high your monitor might not be able to take it. Drop it down to 800x600 and reboot. I got that frequency message last week but I had to reinstall the video drivers while in safe mode. Good luck.

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