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Monitror keeps cycling through on-off

When I boot up the PC the monitor turns on but then it clicks off automatically in a moment, then after a few seconds, turns on and off again. It keeps cycling through the on-off stages. When it turns on- i can see the Windows log on screen momentarily. so I know Windows is booting up correctly. (Windows XP) Once in a while (I have to try and switch it on-off several time from the main power switch) it stays on and works normally. But as soon as it is turned off again or the system reboots again it starts on-off cycles again. I have tried it on another pc with the same results. one if them has on board video, the other one has a video card. can someone help please?

Posted by vince asher on

  • 6 more comments 
  • Anonymous Feb 07, 2008

    Once in a while (I have to try and switch it on-off several time from the main power switch) it stays on and works normally. But as soon as it is turned off again or the system reboots again it starts on-off cycles again.
    I have tried it on another pc with the same results. one if them has on board video, the other one has a video card.
    can someone help please?

  • Anonymous Feb 16, 2008

    Same problem but, but my monitor is and en7220.

  • mdhartley Apr 02, 2008

    I have the same problem so I swapped the monitor for another. When I power the monitor on with no attached computer it does the same thing, so it would seem to be something in the monitor power supply.

  • Anonymous Aug 12, 2008

    monitor turn"s on then goes off

  • Anonymous Aug 17, 2008

    monitor blacks out - the benq screen then comes on and then you can see what you are working on - a few seconds later same thing and it keeps on doing the same thing - on off on off. it is soooo annoying. if you were typing when it goes out - and when it comes back on all your typing is there so it is not the computer. man it bugs me!!

  • 69matt69 Aug 30, 2008

    The monitor shows the start up screen for a few seconds then goes black. When I turn the monitor off then back on again it will show my home page then goes black again. I now the computer working fine yet something is wrong with the monitor. It will only show the screen few a few seconds before going black once I have truned the monitor off and on again.

  • guigadua Sep 15, 2008

    I have exactly the same problem as described in the first description. The monitor comes on for a fraction of a second, then turns off and keeps doing this at about 5 second intervals until I turn it off. It is independent of whether or not it is attached to the computer.

  • epockismet Apr 16, 2009

    I just had the same problem happen to me for the first time this morning, as soon as I turned the monitor on, it started cycling on and off about every second (maybe a little less than a second). I tried switching from the digital connection to the analog one, but the same issue was happening. Not to mention it started as soon as I turned the monitor on. Usually if the computer hasn't turned on yet it just goes to standby until it gets a signal from one of the inputs. From how it eventually stopped happening it seems almost as though the monitor needed to warm up first, which to me is a sign of a physical hardware problem within the monitor that probably has no fix at all other than going inside it and finding the loose solder, or worse, not finding the micro-fracture on some board insid. I'm using a Samsung SynchMaster 206bw. It is also only about a year old. With all the similar issues I've seen just by searching for this problem I feel that Samsung may not be on the top of my next purchase when I need a new one later on.



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I had the same problem used with my mac mini using the DVI connector. The problem continued with the monitor not plugged into anything. The Solution: When I unplugged the monitor cable from the monitor & cycled the power for the monitor on & off, the monitor cleared itself. I rehooked everything up & it works perfectly. Additional info- possible cause - I was using an external, filtered fan to cool my small computer. When I placed it too close to my computer, I I began hearing a every 1/2 second electical popping sound. I don't know if it was an electrical power problem since all were plugged into the same power strip, or if there was magnetic, radio or other electrical problems caused by the close proximity, but that was what was occurring at the moment the monitor then went out. You should review & share with others what led up to the failure, so we don't duplicate your meltdown!

Posted on Nov 11, 2006



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I also just recently started having this problem. If you look at the power brick the power indicator flashes on and off with the monitor. I think that the power brick is bad. I switched to a different monitor and the computer works fine. The en-9110 cycles on/off with or without a computer attached. I contacted Envision about an RMA.

Posted on Oct 20, 2006

  • Anonymous Oct 20, 2006

    BTW: If your monitor is out of warranty, I did see that you can get replacement power bricks on ebay. I would take care to get an OEM one though and not a universal one. Although I don't know if it matters really as long as the plug end fits the monitor and the output voltage AND amps are the same.




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I have same problem my monitor keeps turning on and off continuously and some times its working properly but working properlt is rarecase
plz help me to solve it as fast as possible...

Posted on Nov 21, 2008


We have a number of CTX monitors with failing power boards dropping out the back light rendering it black or appearance it is dead. Given the number of them we have seen it would suggest there is a possible weakness in the design and replacement is the only option

Posted on Sep 29, 2008


Sounds like a power supply problem in the monitor to me...

Posted on Sep 15, 2008


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If you have checked the monitor on multiple computers, then the source of the problem is not your video adapters, or drivers installed. The monitor appears to be defective. Oddly enough, I have the same problem with my CTX monitor. I sent them an email this morning, and hopefully will receive a response soon. I'll keep you up to date.

Posted on Nov 13, 2006


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Sounds like your video adapter settings have been wedged. If you are running Windows XP Service Pack 2, you can use the following steps. 1) Boot the laptop into safe mode. Boot into safe mode with networking support if possible. This can be done by tapping the F8 key as the computer first turns on. 2) Once you are at the Desktop, right click on My Computer and select Manage. 3) In the window that appears, select Device Manager from the menu on the left. 4) Find Display Adapters on the right and click the plus sign. This will list the video adapter that you have. NOTE: WRITE this down EXACTLY. You may need to go and get drivers for this. Seeing this is an older model, I doubt you'll need it, but better to be safe then sorry. 5) Go to your manufacturers support web site and download these drivers. You may not need them, but better to be safe then sorry. NOTE: Skip step 5 if you did not boot with network support or cannot get to the Internet. This can be done from normal mode. 6) Right click on the display adpater and choose un-install. Hit OK on the window that appears and reboot the machine when the process is done. 7) The machine will take longer than usual to boot, as Windows XP is re-discovering the video adapter and resetting everything to the defaults. When it is done booting, the screen may look weird since the settings are now the defaults. You can the set them to what you want by right clicking on the desktop and selecting properties. Then go to the settings tab. 8) IF it did not re-discover the video adapter (this can be confirmed through the device manager), then go ahead and install the drivers. Windows Update will most likely also have the drivers. NOTE: This process should work with Windows 2000 as well, although I was not able to test it. The only issue I can think of is that it may not auto-discover the video adapter, and you would have to manually download and install the drivers.

Posted on Oct 16, 2006

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Hi Sammy7!!

I have such iiyama AS4636D monitor. In this day purchase.
I have such problem with you.
My solution:
Desktop pc and lcd power off (230VAC or 110VAC)
Power on lcd, after early desktop pc.
This moment, when running the pc booting, press and hold you the " + " button.
In this moment come in one blue screen. May be running on the sreen short message: check or select input mode: VGA DVI 1 2 . Select your correct cable connection type.

Have a nice day! and happy new year!

Lajos from Hungary

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