Question No Video Input & VGA LED on Motherboard

Jul 3, 2019
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It works normally before. But today, I turn on my pc but the monitor show "no video input" and the LED labeled VGA on The motherboard is bright red.

Spec
motherboard : gigabyte h370 hd3
cpu : Intel core i5-8400
gpu : gigabyte geforce gtx 1060
...