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Jump to Postmake sure that your CPU is working properly.. if you see this message it means that the Monitor cannot receive any data from your CPU.. when you power on check if the k/b led's lit up, if it doesn't lit up then your CPU is in trouble...
Jump to PostTo save me writing, I've just stolen someone else's answer :)
Your computer may not be booting up.
Have you carefully checked the cable from your graphic card to the monitor? Make sure it is firmly attached to the back of your computer and also the back of your monitor …
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