Hi,

I'm experiencing an issue when boot the machine. Sometime it works correctly but sometimes not.That means one day it works without any issue but next day it doesn't show anything even BIOS.After plug another monitor to my CPU it works.
Device manger shows two monitors but connected only one.

Please let me know any solution on this

Thanks,
Lakmal

Device Manager will show monitors that were connected. So don't worry about that.

At this distance, it appears you'vve got an intermittent fault on one monitor. Could be a dry joint; a dry joint on one of the VGA pins (or however it's connected). Really does sound like a monitor hard fault to me.

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