Reinstall the card, replace the cover and reconnect the display to see if that help.

重新安装适配卡，安好机盖，重新连接显示器，看是否有作用。

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With translucent plastic cover to protect display screen.

用半透明塑料覆盖，以保护显示屏。

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With translucent plastic cover to protect display screen.

用半透明塑料覆盖，以保护显示屏。

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