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There are various beep codes to indicate errors at start up. I need to know this one thing. Can such a beep code occur due to lose connection of external cables.

For example one single long beep is something connected with VGA. I found on some pages that that can sound due to lose connection in monitor cable.

The monitor is not plug in correctly. Please check the monitor cable and be sure it is connected firmly.

Is this true? can it detect lose connections of external cables and beep to indicate that?? I really doubt it.

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They say in your link "One beep and nothing come up on the monitor" - one beep is standard and is normal. So, no, you won't get beeped due to unplugged cable...

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