Hi, Sounds like a video adapter driver is messed up.
You will have to know the make and model of the device, and should know if it is an onboard (integrated chip type) or an added in video card that plugs into the motherboard....this is in case you need to reinstall the drivers from a disk (am hoping you have an install CD around). To reinstall your video drivers, first lets try the easiest way: Go to Safe Mode, Device Manager, select Display.....notice that the Standard graphics adapter is running....thats why you are able to see things in SMode....click on Remove.....and restart. Video drivers should reinstall themselves...but, first, please write down what video device you have.
There is a more complex way to remove the video drivers completely, change to the Standard Graphics adapter, (you will have 16 colors, 489x640 resolution until good drivers are replaced)....but, you would need the install CD....and, this puts you back to the version that came with the computer. If you have no install disk, drivers CD, etc----then, you would have to download them....you should be able to use the Standard graphics drivers to get into Normal mode to get online and download the correct drivers for video for your system and version of Windows. You have to INSTALL them, like any program.... Then, you go through the routine once more....select Display....Settings....Adapter.....Change....have it search for an updated driver....point it to the folder that contains them that you unzipped drivers to, if it is was a .zip download and you had to unzip them.