I have solid line across the monitor

I get this too. (Love using the solid blue background)

1. Check if there are any other users logged in on the Mac.
2. Log off all the users including yourself
3. Log in only on your user account and change the background

If that doesn't work, restart first and repeat.

If even that doesn't work, change to another solid background first and then change it back to the picture.

Mine has a green line. I changed the background to green. It's broken, you can buy an new one or cover it up.

one day my desktop switched from my selected theme to solid black. I could not choose anything else until I activated Windows - because the "trial period" had expired.
That was also in Win7

Yea your monitor is shot. Try it on another computer and see if it does the same thing. If it does not do the same thing, your video card or port is going bad in your computer.

Try an external/different monitor, also if running windows you can try a fallback to a previous restore point. Also try the monitor on a different pc, if it's a desktop. That way, you will know if it's the video card in the pc.

That's your desktop setting which you can change by going to the control panel, desktop, background, and then change the color or put whatever you have for a background. Also note the color and position buttons.

Suspect the Light Engine part # 939P977010

Your comp's video card refresh rate (in Hertz, abbreviated Hz) may not be totally compatible with the monitor. Check the properties of your video card, and change the refresh rate (you may have to look around for it) to 60 Hz. This is a pretty standard refresh rate that works with just about every monitor. If it's already there, I'm afraid someone else will have to try and help!

Hope this helps, and please rate my answer, good OR bad.

Good luck!

Hello!!

If the coolant is cloudy or has debris floating in it, the coolant will have to be changed and the lenses and crt face will need to be cleaned. Coolant can be ordered from any electronic distributer