Monitor flickering Samsung old CRT

Asked By 230 points N/A Posted on -

I have a Samsung old CRT monitor that I use as a second one to my primary LCD monitor. This setup has been working fine for the past 9 to 10 months but recently the CRT monitor has started flickering at odd times.

I searched the internet and found that it can be a VGA cable problem so I replaced that cable but that had no effect. I have tried everything from tightening up the VGA cable at both ends to checking and plugging in the power source tightly to the socket. Any help would be great as I love having two monitors and don’t want to spend more money on buying another one.

Best Answer by Bruce Wayne
Best Answer
Best Answer
Answered By 0 points N/A #106779

Monitor flickering Samsung old CRT


Having a monitor that flickers more often can be an eyestrain and can cause headaches. Flicker is like a fading gap between video display’s cycles. This is more common among CRT monitor users or the “Cathode Ray Tube”. This flickering eyesore happens when your monitor is on a low refresh rate. A refresh rate is a process where a display hardware is redrawn in a single second.

The “Vertical blanking signal” produces by the video controller controls the scan rate of a CRT monitor, it positions the beam of the monitor on the upper left part of the raster that queues the next frame that will be shown. If a monitor has a low refresh rate then you will notice flickering on your monitor because the brightness is dropping for sometime. As an example, if your monitor has a refresh rate of 60 Hz then most monitors will have a flickering display.

There are some serious effect of flickering monitor if they are sensitive, this can cause headache, those who have a migraine and can affect people that have epilepsy that can cause seizures. Setting the refresh as high as 75 Hz can help to eliminate this flicker. You can also use screen filters to lessen the flickering effect. Follow the steps below in correcting the flickering monitor.

1. To change the refresh rate of you monitor, right click on windows desktop and select “Properties” from the pop up menu. A dialog window “Display Properties” will appear.

2. Select the “Settings” tab and click the “Advance” command button. It will display the “Advanced Settings” window which let you configure the display settings in advance mode.

3. Select the “Monitor” tab.

4. On the “Screen Refresh Rate” click the down arrow to view the list of refresh rate.

5. Select a refresh rate higher than your current refresh rate settings.

Another way is to change the hardware acceleration. Access again the display properties by right clicking the desktop and choosing “Properties” Click “Settings” tab and Click “Advance and select the “Troubleshoot” tab. Under Hardware acceleration move the slider to the left until the flickering effect on your monitor disappears. This will also improve your computer’s performance.

If you get this monitor problem because of some program like an Anti-virus when scanning is started then you might have to schedule a scan when no one uses your computer, or might as well change to a different anti virus.

Another cause of this might be a problem on your outlet. Try to plug it on another outlet and see if it fixes the problem. Double check the monitor cords and if you are using video card, check it. You might be having a bad graphics card. If none of these solutions fix the flickering problem of your monitor, better to have a technician to examine your monitor.

Answered By 0 points N/A #106780

Monitor flickering Samsung old CRT


If there is any device which generates a magnetic field (Cell phones, speakers…etc), remove them. If the problem exists, please check electronic components in the monitor (especially ICs). When the time passes lot of CRT monitors get this problem due to this reason. There is no reason to worry, because ICs can be replaced.

Login/Register to Answer

Related Questions