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I have a compaq 7020 and everything is plugged in right but when I turn on monitor the green light comes on but blinks and turns off. Why??

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One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect your hard drive

Test all leads that attach to your hard drive including electrical extensions IDE,SATA

the leads from your "((motherboard to your hard drive))" make sure they have a secure connection and are not faulty or just replace them there probably old and faulty

make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error If your computer came with a motherboard disc the drivers could be on it or you might have a dirty graphics card remove the graphics card and clean the socket

hope this helps

Posted on May 26, 2011

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It sounds like the screen is bad. A quick search with the model number and "LCD Screen" will show you that it would be cheaper to purchase a new monitor.

If it was the back light it would be an easier repair. But you are saying it does not come on at all so that is telling me the screen itself is bad.

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It could be your monitor is fine. It simply goes to a cycle when its turned on and does not detect any signal coming from your CPU, it simply goes on standby mode (hence the darker image and orange/blinking light.) have you checked the computer (CPU) part?

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FYI: Their monitors carry a three year warranty. 

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