Hello,

I am having problems with my monitor!
The PC works fine for an unspecified period but then all of a sudden the monitor will flash up the message "No VGA Input Signal" and will then go to sleep. There seems to be no way of getting the PC to wake up again once it's done this and I'm left having to turn the whole thing off.

I've looked up similar problems on various sites but other people only seem to be getting this problem on start up whereas mine works fine for maybe several hours but then suddenly stops.

Any ideas? Would be much appreciated!
Thanks.

Here are some places to start.

1. Check the monitor cable. Make sure there aren't any bent pins.
2. Reseat the graphics card, if it's not integrated with the motherboard (remove and reinstall it -- making sure it's seated properly).
3. Right-click on the desktop and select "Properties". Click the "Screen Saver" tab. Click the "Power" button. What settings are in there?

Go to control panel>power>monitor then it will ask for some options then check all the options as Never and click on the OK. Your monitor will work fine and it willn't go in the sleep mode again.

Is the computer itself still running(can you hear hard drive fans etc?) if so then here are your possibilities

Bad signal/power cord on monitor. Move the cables around to see if the screen comes back on if no then see next.

Your monitor itself could be going bad or overheating, however this is the least likely of any of the options, so its one to get back to.

Video card over heating/going bad. Do you have a built in thermostat? If so what's the temperature reading when you loose signal? Another option is to buy a computer thermometer or sticking one inside the case. Also try removing the side panel from the case and see if it takes longer for it to loose signal(better air flow, so lower temperature, if that works then you need to get additional cooling in your system). And as posted above reseat the video card/check connections. Also ensure that all fans are in fact operating.

CPU could be over heating. If this is the case the whole system will shut down, to see how to trouble shoot/fix this again see above post.

Now this is the mostly likely issue if your computer is running after the monitor goes black.

PSU has gone bad. The reason this generally identifies the PSU going bad is that the systems are built that if voltage drops, the computer automatically turns off the one thing it doesn't need to keep running which is your graphics card. Even if the power goes back to the correct output, it will not turn the graphics card back on without a reboot. In this case if you have another PSU you can test inside the case that is the only way to tell for sure wither or not the PSU is bad. Multimeter tests can be done, but they are not a guarantee because it may not be fluctuating at that exact moment your doing the test. Though it is a test that should be done.

So If you here noise after monitor turns off first check:cables, then reseat card(s), then(or during the other tests) check temperature. As all those test cost nothing but a little time to do. Then swap/replace PSU.

If the PC isn't running:Check temperature, this is almost for sure your issue. PSU should also be checked though.

For temperature if temps are above 48 degrees C you need to get additional cooling in the PC with fans, though this may only help some because if the case design is bad you will still not get proper air flow. Another option would be to with the side panel of have a fan or two blowing inside of the case to help cool.

When you turn on your computer and turn on your screen it say going to sleep as soon as you turn it on
The problem is not your video card. Let me guest you try unplugging everything and plugging then back but still not working,
The problem is it your computer it when it upload with lot of stuff and full, almost like this when you delete your webbrower
It go in the recycle bin, when you download stuff it go in the recycle bin, when you delete it from the recycle bin, where do it go at in your computer hard drive which it overloaded make the computer fan run really fast, what you need to do is open your computer the should be 2 or 3 plug got 4 mouse you need to switch it. And try clearing the fan once you open it because it might be full with dust: by: bkbatman

A plug with 4 mouth I mean

Hey, I have a imilar problem to this but this has just recently happened after updating my display driver software, after I completed the download of the update it asked me to restart computer so I accepted it and it restarted. The problem is that my monitor does not come on at all, it stays on standby. The computer is turning on fine I hear fans and start up beeps but my screen remains on standby, I have tried all the simple stuff such as checking cables for bent pins and faulty connections but I am not too great with computers, wondered if anyone could help me please? Thanks in advance

Hey, I have a imilar problem to this but this has just recently happened after updating my display driver software, after I completed the download of the update it asked me to restart computer so I accepted it and it restarted. The problem is that my monitor does not come on at all, it stays on standby. The computer is turning on fine I hear fans and start up beeps but my screen remains on standby, I have tried all the simple stuff such as checking cables for bent pins and faulty connections but I am not too great with computers, wondered if anyone could help me please? Thanks in advance

What u need to do is grab the moniter and throw it against the wall and if THAT doesn't work then call a technician Oh and another good idea is to insert a copper coil into the fan while holding on to a large batterie... if that doesn't solve your computer problems it'll certianly solve your life's problems

All you have to do is unplug all the connection of your system and then plug it again... It is because of your VGA/video card that overheat...