VGA port on Laptop not putting out signal
Hi all, I have a new Dell latitude 6430. Dell external monitor was working then just stopped. When I plug in the VGA cord the external monitor wakes up and shows that it's getting a signal, but the screen is black. I've adjusted the display settings to clone the displays, just use the external, etc, but still just a black screen. I've checked and have the latest drivers, as well as swapped out the VGA cable, and tested a different external monitor with the same results. Also, uninistalled and re-installed the graphics card with fresh drivers.
Any help on this would be greatly appreciated.
Any help on this would be greatly appreciated.
ASKER
Thanks for the post! The only ouput channel is the VGA. I have not run a diagnostics on it yet, but will try that and post back the results.
You've also tried booting it from scratch right with the monitor hooked up instead of swapping it out at the OS stage? Sometimes signals need to be regenerated at boot up.
ASKER
Yes, have booted it with the external monitor attached with same black screen result.
I assume you've tried this, but just to be sure -- have you pressed the hot-key combination that switches between internal, external, and both for the active displays ?
... and do you have the "extend this display" option set in Display Properties ??
... and do you have the "extend this display" option set in Display Properties ??
ASKER
Yes i have used the hot-key combination. And extend display is enabled
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if you reboot - nothing on the external screen as well ?
ASKER
133tf0b - No third party applications that i know of, but I will double check today. This is a brand new laptop. External screen was working on Thursday when I set up the new laptop, but when He came in on Friday and connected the external monitor, that's when it just stopped.
ASKER
That is correct nobus, after re-booting, external screen is still black. Receiving a signal, but still black.
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what happens if you boot to safe mode, or from a booatable cd, like knoppix :
http://distrowatch.com/table.php?distribution=knoppix
http://distrowatch.com/table.php?distribution=knoppix
ASKER
garycase, yes background is black, but still can't drag anything to external monitor. Mouse does not leave desktop.
nobus, Safe mode gives me no access to even use external monitor. Same results with bootable disk (BartPE)
nobus, Safe mode gives me no access to even use external monitor. Same results with bootable disk (BartPE)
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I appreciate all the feedback regarding this, but I wound up just getting a HDMI to VGA adapter and using the HDMI port on the laptop rather than the VGA port. Thanks for all the suggestions though! I split up the points among all three of you for your helpful input.
CAn you run a diagnostics test on the laptop as well or boot with a Linux Live CD and see if it works to help troubleshoot hardware / software issue