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Your monitor needs to be replaced more than likely.
Try using another monitor to isolate the problem. Borrow a monitor from a neighbor, friend, relative or co-worker and connect it to the computer. If the Borrowed monitor displays ok, then your original monitor is bad. If the Borrowed monitor shows the distorted colors, then your video card inside the computer is bad.
Sounds like either the monitor or video card inside the computer is bad. Try connecting another monitor to the computer. Borrow a monitor from a friend, neighbor, relative or co-worker and plug it into the computer. If the borrowed monitor displays ok, then your original monitor is bad. If the borrowed monitor does the same thing and not show a display then your video card inside the computer is bad.
You do not say which operating system you are using.
This depends on your graphics card.
Right click on your desktop > Properties (Personalize) > (Display) Settings.
If you can see an image of 2 screens, 1 large, 1 small with the number 1 and 2 on them, then your graphics card can handle 2 monitors. When you connect the 2nd monitor you can use this control to switch between 1, 2 or both monitors, both monitors showing as 1 large screen or a split screen
If not, you will need to buy and install a dedicated grahics card matching your monitor(s)' port types and with Dual Monitor capability. Choose one with 2 video ports for maximum flexibility.
E-Machine tech support are the same as Gateway Support. their answer to to reload always. sounds like a trouble video card or Monitor. try plugging in a different monitor and see if you have the same result. Make sure to check the pins on the video cable to verify none are bent. if you get the same results. you have a bad video in the computer. If it is, I believe that the video is actually integrated into the mother board, you can purchase a new video card and plug it in, that will automatically disable the onboard video.
I have the same model after youlet it sit for a long enough period to cool down it will come back on and work normal, it is a cooling problem called gateway and they confirmed this theproblem I ran in to was what fan this computer has 3. temp fix I used was to remove the tower cover to allow better air flow try this till you can figure out what fan is messing up
It sounds like it's a problem with the video card, as opposed to a problem with the monitor. If you have another machine, or a laptop, or a friend with a laptop you can find out - just plug it into the other machine, and if the problem goes away, it's the video card. If not, it's the monitor.
While the card may be bad (if it has a dead fan, and has overheated) you will probably need to replace it. But if may just be loose, assuming it is a and on video card and not an onboard one. If it is an onboard video, you can usually disable it and put in an add on video card, which would resolve the issue as well.