Desktop monitor flickering

Potential Problems:
Cables
One possibility is that your cables are messed up. The 15 pin connection cable could be malfunctioning. You should get a new cable and replace it to see if it helps your situation. If not, the problem lies somewhere else.
Environment
There could also be an electromagnetic interference affecting your computer. You should move the laptop around the building or room to see if the position of the monitor changes the flickering. If it stops when you change positions, then there is something in the virtual environment affecting your monitors ability to display properly.
Display settings
If your display settings are improperly set, then your screen could flicker as a result. You should go into your desktop main screen, click Properties > Settings > Advanced > Monitor, and set your screens refresh rate at around 85 hertz or less.
Video card
The other possibilities are that the video/graphics card that was integrated into your computer has stopped working. You should switch it out with a new one to see if this helps your situation.
Monitor
Try to plug your monitor into a different PC/laptop. If it works properly, then you have an internal computer problem. You should also update your monitor's drivers just in case.

Look for your computer's monitor settings, then adjust its refresh rate.
To modify a refresh rate on Windows, right-click anywhere on the Windows desktop. Select "Properties," then choose the "Display Properties" tab on the window that appears.

Click the "Settings" option, then select "Advanced" from the window that appears. Choose the "Monitor" tab, which lets you access a drop-down menu with the options for refresh settings adjustments. As a basic guide, use a setting of at least 75 hertz.

Confirm the change by clicking "Apply." Reboot the PC to ensure the new settings on the screen take effect. Check your screen if the blinking problem is resolved. If not, try a higher refresh setting. If there is no change on the flickering of the screen, this means the problem is not caused by the screen's refresh rate. If your computer is not running on a battery or surge protector, shut it down to safely transfer the plug to another outlet Hope this helps.

The monitor is about to go bad. Replace it. Borrow a monitor from a family member, neighbor or friend just to see if the flickering stops. If it does stop your monitor is bad. If the borrowed monitor flickers, you will need to replace your Video Card in the computer.

Good morning, afternoon, evening or night; whatever time of day you are viewing this solution post. Thank you for choosing FixYa to answer and solve your problem. Your Compaq MV520 Monitor is always blinking every time you turn on your computer and you want to know how you can fix it? First, we need to troubleshoot the problem. I'm thinking you probably need to refresh the flicker rate on your monitor. The flicker rate is probably set on a low setting, which is causing you screen to blink (flicker). This can be bad for your health as well because it can cause eyestrain and headaches. Your monitor is a CRT (Cathode-Ray Tube) model. These types of monitors can cause a lot of screen flickering. Now that we've troubleshooted the problem, now it's time to solve the problem. There are two ways you can solve this problem. You can either refresh the flicker rate or you can buy an LCD monitor. LCD monitors flicker-free. My suggestion is that you refresh the screen flicker rate. To refresh the flicker rate, go into your System Preferences or Control Panel, click your operating system's appearance and display link and click your screen adjustment link. You may have to click your advanced settings link. Click your monitor tab and from there adjust you screen refresh rate. You may have to adjust your screen resolution before you refresh the screen rate. If you have to do this, make sure the screen resolution you choose supports you monitor's height and width as well as visibility. The higher the resolution, the higher the screen rate. The instructions I'm giving you may sound like this because I'm not sure what your operating system is. I'm not to familiar with Mac Operating Systems, but if you have a Windows Operating System and you need better detailed instructions, just reply back. I hope this decreases your screen flickering and gives you a better viewing experience.

Need to change or repair monitor at this stage.

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.

connect the monitor with another desktop. If if works then problem is with your ram/graphics card or motherboard with inbuilt graphics. If the monitor functions the same way as before have a look at the pins on the connector. Bend/dirty pins can play havoc. If they are ok take the monitor to service centre.

it sounds like a problem with the monitors picture tube or something.......get a technician to have a look at it, immediately

if you test it with another monitor did it flicker? if not your monitor has a problem. if it still flicker the problem will be pointed to the video card. try to replace the video card.

Check cable first