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My screen acts in sleep mode when computer is turned on

\015 It is a Hewlitt Packard Desktop and when you turn the computer on, the screen acts like it is in sleep mode. The screen comes on yellow and then goes black. Is it a monitor problem? I do not have the model number. It was purchased in 2001.\015

Answers :

It is likely not a problem with the monitor, because the lights indicate that the monitor is turned on.

It may be a video card problem. Do you know if you have a video card, or if it is integrated graphics? Check all of the connections from the monitor to the computer. If you can connect the monitor to another computer and it works, then it is definitely your computer.

Very, very unlikely, but it could be that you're using a damaged cable. If you have another one on hand, try it. If not, don't go and buy one because this likely isn't the problem.

Another thing you could try is turning the computer off, unplugging the power cable (going to your computer), and hold the power button for about 30 seconds. Then plug it in again and power it up.
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