DISPLAY YOUR OWN MADE WARNING MESSAGE EACH TIME THE COMPUTER BOOTS!

Check your engine oil using the oil dipstick located on the engine - you need to add oil to the fill line as shown on the dipstick. You should have the oil replaced regularly (every 3-6 months) and keep your eye on the level if the engine is leaking oil underneath or burning a lot of it.

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Sounds like your monitor is bad. Try another monitor because if the video card was bad and the monitor is working you would get a No Signal message on the screen. Borrow a monitor from a neighbor, friend, relative or co-worker and connect it to the computer. If the Borrowed monitor displays ok, then your original monitor is bad. If the Borrowed monitor does the same as your original monitor and does not display anything, then there is an issue with your video card.

If you restart your computer and either go to the Bios setup menu (usually by pressing DEL or some other noted key, in the first few seconds of power up) does the same "contrast" menu still appear?

If so, then it must be your monitor (likely Monitor, not computer)
Your monitor is mad at you and it is displaying a Warning Message that is part of its OSD (On Screen Display). Some monitors are more sensitive then others so it takes very little to get this type of message. To get rid of it you will need to use the buttons on the monitor to get into the OSD menus. You need to look for something like "OSD Settings" or "Warning Message Settings" which may be found under "Setup Menu" or "Options Menu". This all depends on the make and model of the monitor as they are all slightly different.

Once you find this area you will need to turn off a setting that will be called "Warning Messages" or "Display Notifications", again the wording may be different but the idea is the same. Once you find the setting you should have the choice to set it to "ON", "OFF" or to an amount of time it will display (5 seconds, 15 seconds etc...).

On my Viewsonic the setting is found under "Setup Menu", and then I turn off "Warning Notification".


GOOD LUCK!!

ps. If the display looks OK then there is most likely nothing wrong. The message appears because the monitor detects a setting that may be in error. If the message goes away after a bit and doesn't bother you, you may choose to ignore it.

It sounds like the computer is trying to use a resolution that the monitor cannot handle. Boot into safe mode by pressing the f8 key during boot up and select safe mode. Once booted, right click on the desktop and select properties. In settings lower the resolution by moving the bar to the left and reboot.

I would move it all the way down, you can then move it up a step at a time once you are in normal mode again.

Hope this helps