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Monitor displays blue box 'no signal' then goes off. Tried different cable, same thing happened.

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Check all connections, cable is hopefully good. Then go into maybe the video card is either faulty or that maybe the monitor you want to use cant use a setting that the PC is trying to use (1280x1024 from the pc where the monitor can only go 800x600 for example) also check the Hz rating and make sure that the computers on the lowest Hz setting. Maybe the monitor can't handle the Hz the computer wants to use.
Assuming your in windows... and have no other means of getting to the settings try booting the system.. as soon as it 'beep's tap the F8 key several times and you should be able to get into the safe mode option. after you get in there get into the video settings and try to adjust the resolution and save it. after that you can reboot and it should come up as what you saved.. then you can tinker with the setting to figure out what the monitor can do. Next time try to give a model number and maker of the monitor. :)

Posted on Aug 03, 2010

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I have a acer.x223w when,it powers up the.screem stays black, n i get a blue blinking light on.the bottom


I disagree with ikkenom only due to the symptom of the flashing blue light. This would indicate to me that the monitor is not getting any display signal and is in sleep mode at least the is what happens on my Samsung monitor. Used to be that they use a two color led in the monitor, green when ON and getting display signal and amber or orange when in sleep mode. I would check the computer by trying a different monitor. If you have a second monitor, great, if not, maybe a friend will let you bring your computer over and try the computer with their monitor. Could also be a display adapter setting. Do you get any change when you first turn on your computer? i.e. Do you get the BIOS or manufacturer screen when first turned on? Also if you disconnect the monitor cable from the computer and power cycle the monitor, do you get a No Signal display for a few seconds before the monitor goes black and the blue light starts flashing?

Let me know what happens with the testing above or if you need further instructions to carry out testing.

Thanks, Jim

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If you have the same problem with both monitors, it sounds like a display card setting or problem.
The chances of you having the same problem with different units is 1- 50.
Try the monitors on a different PC and get back to me.

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There are a few things you can check. First, try to see if the monitor cables are firmly connected on both sides (computer and monitor) no need to remove any cable for now just check the monitor cables (ends should be blue or white on both sides) Then check if you got an imput button on your screen (like all TV and some monitors now has) This input gives you the choice between a few possible connections and it may be on the wrong one. Just cycle trough the input modes and I think you will have your image back. If Still, you dont see anything, try a different monitor or try to connect your monitor on a different PC/laptop. In fact blinking blue could be there because the monitor is awaiting a signal on the input it's listening. At worst it could be because your video chip/card dont send a signal to your monitor, could happen, but imo it's probably not the case.

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Actually, if you have not noticed, electrical things tend to act weird during thunder and lightning storms(power outage?) For instance, my little sister has a bear with a voice box that sits right up against her wall and when ever theres a thunder storm it goes off. (Scare me to death ;) ) But perhaps something like this happened to either the PC or the monitor. OR Does is the monitor tinted yellow, blue, etc...? Because that is a connection problem try screwing the cable from the PC air dusting the port and the end of the cable and making sure it id firmly screwed back in.

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Problem with the monitor


Hi,

The three boxes represent the built-in diagnostics of the monitor. The letters G is green, B is blue and R is for red, the 3 color guns of the picture tube of your monitor. The words "Self Test" indicates that it is in diagnostic mode since it has powered up, it is also then expecting a video signal from a source to be coming in; the display "Check Your PC And Signal Cable" indicates that it is not receiving any video signal from the source which is your PC or more specifically the PC's video card; and the display "Monitor Working" indicates that the diagnostic has determined that nothing is wrong with itself and therefore it has got to be your PC that is in question. The intermittent appearance of the boxes is when the diagnostics restarts itself and eventually finds the same problem.

To determine if it is the PC or the monitor, use another PC (even a laptop with matching VGA output) and try it with your Compaq monitor, see it it will work or alternately, try a different monitor to connect to your PC. The outcome will determine which is at fault.

If you have determined/verified that it is indeed the PC, you should focus on the video/graphics card. In some PC models/versions, the graphics/video is built-in to the motherboard and you should check the memory since this is shared. The only way is to replace either.

Hope that this be of some help/idea. Pls post back how things worked out or should you need additional information.

Good luck and kind regards.

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Is it my monitor or my video card


1.there might be a problem with your signal cable. if one of the pin in the signal cable is open. it might also happens
2.adjust signal cable.
3.Check VGA video card is working properly. unplug the VGA card and Re-plug to its slot. if your mother borad has inbuilt video card. this process cannot be performed
4.Even problem with operating system might also happen.. problem with Video Ram memory
5.if you want to check whether your monitor is ok. just get Cpu Box alone frm friends for a while for a testing.
6. if your monitor have problem then contact service centre.

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That one is going to take component level troubleshooting. It could be the power suply, but I might first suspect the video board.

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well your screens broken mate the only thing you can do is get a new one

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