You have a possible hardware problem! Is the monitor light green or amber/red? If it's the latter it's not getting a video signal which means it can be anything from the cable to the video card to the motherboard etc! Do you hear any beeps from your computer or just 1 on start up? 1 beep is normal any more and it will spell out a fault code! More details are required for an accurate diagnosis!
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You have a possible hardware problem! Is the monitor light green or amber/red? If it's the latter it's not getting a video signal which means it can be anything from the cable to the video card to the motherboard etc! Do you hear any beeps from your computer or just 1 on start up? 1 beep is normal any more and it will spell out a fault code! More details are required for an accurate diagnosis!