Hello, I have a OptiPlex GX620 has 0 beeps, the Power Button is still green. My Computer screen is just a white-ish underscore. And there are like 2 small white lines that are like flashing kind of. I need help fast please. My OptiPlex GX620 is at least 2-3 Years old. Please help me fast. Also my mouse and keyboard won't light up.
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