Why does the computer sometimes go black after starting up after setting dual screen display?

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Why does the computer sometimes go black after starting up after setting dual screen display?
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Your memory may not be compatible.
If 2G is detected, it indicates that it is not recognized.
Go to buy the memory and try to change it. Take the notebook with you.
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It seems that the only thing I can do is to brush the machine. The goods I bought are killing me,
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Remove the notebook battery and connect it directly to the power supply.
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Refresh the software,
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ZOL Q&A > mobile phone > screen > Mobile phone black screen > Why does the computer sometimes go black after starting up after setting dual screen display?

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