Monitor settings I was trying to get a wavy verticle line off my monitor screen and changed something in the front controles that reduced my display down to half and I can not get it back to full screen.

The Display panel could be bad/damaged or the main board that controls every thing could be bad---parts for Dell equipment are known to be hard and sometimes impossible to find.

There may be a few issues her, try changing the contrast andbrightness of the screen, this can be done by using the buttons on the monitor,check any documentation you have if you're having trouble. If this doesn't fix it could be a monitor problem for your videocard itself. Try using another monitor,if possible, to test your video card or try your monitor on another pc/laptop. If the monitor works fine on another machine then chancesare it's a problem with your video card, it may even need replacing.

Try to use Cntl+Alt+Arrow keys to rotate the screen. Also go to display settings and change the monitor DPI setting will also resolve your problem.

Thank you for using Fixya.

kdoran121, Some component part has failed inside your monitor!! Possible verticle drive signal is "bleeding" into the horizontal signal is causing your "wavy effect" to occur on screen. Electronic technician will need to troubleshoot problem down to "component level" to solve monitor problem. That's my best guess on this one. You could try to swap-in a known good monitor to your pc, just to prove that the monitor is the problem and NOT your pc!!! Yes, I still have a 9 year old CRT monitor connected to another pc and if and when it FAILS, I will send it to the curb on trash-day!!! 12fixlouie

There could be many reasons:
1. Refresh rate set on your display adapter is too low & needs to be increased.
2. Monitor is placed near to a source of electromagnetic interference, such as powerful speakers, air conditioner, .... etc.
3. Defective monitor cable or loose connection.

As i understood the explanation you have a problem with the Video card not the LG Monitor.

Flickering may b due 2 ur Display configurations so u may also use some Display software or u may manually correct it.

Properties>Settings>

1. adjust ur screen resolution

Change the refresh frequency for your monitor To change the refresh frequency for your monitor

1. Open Display in Control Panel.
2. On the Settings tab, click Advanced.
3. On the Monitor tab, in the Refresh Frequency list, click a new refresh rate.

Notes

• To open Display, click Start, point to Settings, click Control Panel, and then double-click Display.
• The default refresh frequency setting is 100 Hertz, although your monitor may support a higher setting. Check your manufacturer's documentation for information regarding the settings your monitor supports.
• A higher refresh frequency reduces any flicker on your screen, but choosing a setting that is too high for your monitor can make your display unusable and cause damage to your hardware.
• Changes to the refresh frequency affect all users that log on to the computer.

The spec sheet I found says your monitor should be able to display 1280 x 1024, 720 x 350, 720 x 400 and four other resolutions in the 640 x .... range which are pretty useless. Try setting ti to 1280 x 1024 at 16 million colors @ 60 Hz and let us know what happens.

I would suspect defective filter capacitors in the sweep circuits as well as the power supply source voltages.

This is a fairly common occurrence, typically due to signal loss. The longer the total cable run (monitor to computer connector) the less loss you will have. The longest KVM to computer cable I can use reliably these days is about 12-15? at 1024 x 768 at 32 bit color or 8? for 1280 x 1024 at 32 bit color. Things you can do to reduce loss: -Reduce the length of the total cable run. -Increase the quality of the cables used. I only use low loss cables now and have far fewer issues. -Change the video card, some cards can push a signal a longer distance that others. -Reduce the resolution/colors the video card displays. -Try a different monitor or if possible use a different (low loss) cable to connect the monitor to the KVM. Let us know how it turns out or if you have any other questions.