external monitor & Dell Studio laptop trouble

August 17, 2010 at 14:08:31
Specs: Windows 7
I recently purchased a Dell Studio laptop with an i5 processor and an ATI mobility Radeon HD 5450 GFX card. I was setting up an external monitor with a HMDI cable and set it up in catalyst control center and was choosing the resolution the monitor could handle, once i clicked apply to my choice the monitor went black and said no signal, after two weeks of tinkering, tech support, and remote controlled assistance I still am stuck with the same problem. Catalyst does recognize that a monitor is connected but says its disabled and doesn't have an enable option. I'm out of ideas and out of time, does anyone have any ideas?

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#1
August 17, 2010 at 21:25:06
What are you connecting to via a HDMI cable?
How long is the HDMI cable ?
You need to use better cables or devices attached to the cables, or HDMI cables connected to devices with network cables in between, for longer distances.

Did you have video on the external display via a HDMI connection before you changed the resolution ?

"Catalyst does recognize that a monitor is connected but says its disabled and doesn't have an enable option."

You can't enable the second display in the Catalyst settings.

Windows often only enables one display by default when you have two connected.

RIGHT click on a blank part of your main Desktop screen , choose Personalize - Display Settings.

There should be two monitor (display) screens there.

Hold your cursor over each screen.
One will say "Not Active" (or Disabled, or similar) .
RIGHT click on that display, click on Attached to insert a check mark in the small box, if that's not already there.
(I presently do not have a second display attached - if there is something there where you can Enable the display, or similar, click on the small box for that to insert a checkmark. )

Click on OK at the bottom of the Display Settings window.

Close the Personalize Window

You should have a display on the external monitor, if the HDMI cable situation is adequate for the distance.

If not, try rebooting.

(If you still have no video on the external display, you have chosen a resolution that produces no video.)

Once Windows has been set to enable more than one display, it will retain that situation as long as the cable to the external display is still connected while Windows is running.

If you unplug the cable to the external display and boot Windows at least once with that cable disconnected, Windows will revert to enabling only the built in display again - in this case, you will have to enable the second display again the next time the HDMI cable is plugged in.
......

A second situation with a laptop......
Many of them have a key combo you can press that will toggle enabling only the built in display, or both the built in display and an external display, or only the external display.
See the Owner's or User's manual.

(If you still have no video on the external display, you have chosen a resolution that produces no video.)


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