"My monitor is displaying the message VGA Mode Not Supported." I've had calls regarding this issue a couple times at our computer repair store in Fargo, ND. Users usually encounter this issue after adjusting the settings in the display properties menu so that the icons won't be so large.
If you have recently adjusted your screen resolution and now are being greeted with the wonderful VGA not supported message on your computer monitor and the screen does not return to its original settings after a minute or so, put the phone book down; don't call for help just yet. Let's walk through some trouble shooting steps first and see if we can get that VGA mode not supported message to go away.
Small Lcd Vga Monitor
1. Let's power the computer off in order to boot it into "safe mode."
2. Restart your computer and start pressing the F8 key on your keyboard.
3. You will be presented with the Windows Advanced Options Menu that contains several options to choose from. In this case you will scroll down using the down arrow on your keyboard to the option, "Safe Mode" then press the "Enter" key on your keyboard.
4. The next screen should display "Please select the operating system to start:" typically the name of your version of windows will be displayed and highlighted in white, I recommend you just press "Enter" on your keyboard at this screen.
5. Now you will see a bunch of white writing scrolling about your screen and after a few moments you should be able to login to Windows.
6. You may receive a prompt asking if you really want to boot into Safe Mode. Choose Yes.
7. Once Windows is fully booted, you will be in safe mode.
8. Now right-click on the desktop
9. Choose "PROPERTIES"
10. The "DISPLAY PROPERTIES" menu will come up, then press on the "SETTINGS" tab
11. In this tab you will see a slider bar that can be slid from left: (Less) to right: (More). Slide the tab to the left toward the "Less" option. After positioning the slider to a lower screen resolution be sure to press "APPLY" then "OK" on the bottom of this menu
Usually a 1024x768 screen resolution will be sufficient for most monitors.
12. Now reboot your computer as you would normally and that lovely "VGA not supported" message should be long gone.
I run a computer repair store in Fargo, ND and when I get a call from a customer experiencing an issue like this, I generally try to walk them through the steps over the phone because it takes more time to disconnect everything from the computer, load it up into their car, and bring it into the shop; only to be charged a shop minimum and possibly be made to feel somewhat ignorant. That's just bad business!
I see it this way. If I can help a customer solve the VGA mode not supported issue (free of charge) over the phone. They will be more likely to use my services the next time they have a major issue that takes some actual skill. That's just good business and it works wonders for word-of-mouth.