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I've not done dual monitors with that specific computer but have done so with others using the HD 4600.<br />
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Have you tried running the system with only the VGA monitor connected?<br />
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Are you running Windows? &nbsp;Which version? &nbsp;I would check where you set the screen resolution to confirm that it is finding both monitors and that both are enabled.
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I've not done dual monitors with that specific computer but have done so with others using the HD 4600.

Have you tried running the system with only the VGA monitor connected?

Are you running Windows?  Which version?  I would check where you set the screen resolution to confirm that it is finding both monitors and that both are enabled.

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Running Windows 8.1 Pro; Running with only VGA monitor connected does not work. &nbsp;Checked Bios to see if anything was turned off, but that option is not present.
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Running Windows 8.1 Pro; Running with only VGA monitor connected does not work.  Checked Bios to see if anything was turned off, but that option is not present.

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Thank you! &nbsp;Your answer makes sense and I appreciate your time finding it for me.
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Thank you!  Your answer makes sense and I appreciate your time finding it for me.

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I have a ThinkCentre M93Z to which I would like to add 2 external monitors. &nbsp;Will the default Intel HD Graphics 4600 card support this? &nbsp;I have a monitor attached to the Display port and another to the VGA port. &nbsp;But the monitor attached to the VGA port shows a screen message: &quot;No VGA Cable&quot;.
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I have a ThinkCentre M93Z to which I would like to add 2 external monitors.  Will the default Intel HD Graphics 4600 card support this?  I have a monitor attached to the Display port and another to the VGA port.  But the monitor attached to the VGA port shows a screen message: "No VGA Cable".

Dual External Monitors on ThinkCentre M93z

A monitor or a display is an electronic visual display for computers, usually comprised of the display device, circuitry, casing, and power supply. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size. They are connected to the computer via VGA, DVI, DisplayPort, Thunderbolt, LVDS or other proprietary connectors and signals.