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Re: lcd not giving system only flickerring but not on
Sounds like you have bad capacitors on your main power supply board you can replace them if you know how to solder solid state electolitic componets. not hard but you need to know how. may want to just replace monitor
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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.
Disconnect the lcd from the computer. Turn on the LCD and see if it still flickers fast. If it doesn't then go ahead reconnect the lcd back to the computer. If its still flickering, then go ahead and hook it up to another laptop or desktop. If it doesn't flicker on another computer then that means there is a problems with the video card on the original computer.
If it still flickers then that means the lcd is bad and would need to be replaced.
This is often a problem with the backlight on the LCD panel. If you gently tap the side of the LCD does it flicker more? If it does, then there is a loose connection in the LCD panel, and you might be able to get a comptuer shop to fix it, but it usually is expensive. If you don't mind using the laptop as a desktop, then get an LCD monitor and a USB keyboard and mouse, and you can use it as a desktop.
Flickering on the screen can be caused by defective hardware in the computer or by improperly installed software, but it can also be caused by interference from external devices. The following examples describe situations in which your screen could start flickering:
Screen starts flickering because of interference caused by devices which generate magnetic fields, for instance:
a TV set
a laser printer
hidden power lines
Apart from interference, an incorrect setting in your system CMOS setup can also cause flickering. On some systems it is possible to distinguish between interlaced and non-interlaced monitors. The setup of your system should always be colour non-interlaced.
Proximity to the monitor of fans, air-conditioning units or other devices with rotating motors.
The number of devices using power from the same electrical line. Are you overloading the plug?
Monitor placed on an unstable surface.
Improper video drivers, this is a software problem, see section B
An improperly configured or a defective video card.
Reinstalling the video drivers
Start the computer.
Click Start, select Settings, and click Control Panel.
Double-click the System icon.
Select the Device Manager tab in the System Properties window.
Make sure that View devices by type is selected and locate Display adapters and Monitor in the list.
Click the plus sign (+) in front of both items to get a list of installed devices.
You need to remove every device by highlighting it and clicking the Remove button and OK when the warning message appears.
After doing so for both items, they should disappear from the list.
Close the Device Manager by clicking OK, and you will return to the Control Panel.
Double-click the Add New Hardware icon.
Click Next, select Yes when it asks "Do you want Windows to search for your new hardware?", and click Next twice to start searching for new hardware.
This will take a few minutes and, after it is finished, you will have to restart the computer. Windows 95 or higher will automatically set up the correct monitor and video drivers.
If the screen is still flickering, click Start, select Settings, and click Control Panel.
Double-click the Display icon and select the Refresh tab.
Change the Monitor Refresh Rates until the flickering disappears.
If the flickering remains, go to step C.
If it is possible, connect a different monitor to the computer. If the flickering disappears, it is a fair indication that the monitor is defective, otherwise go to the next step.
Set up the computer and the monitor on a different place in your house. If the flickering disappears now, it is most likely an interference caused by something in the original location. Check for devices which can cause interference.
If the flickering persists, check the setup of your system. If available in the setup, make sure that the option Monitor Type is configured as Colour Non-Interlaced.