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Windows 7: HDMI output not working.

20 Jul 2011   #1

Windows 7 Home Premium 64-bit
 
 
HDMI output not working.

My laptop crashed when removing the HDMI cable... totally dead... had to pull the battery to get it restarted. Now unfortunately the HDMI output is no longer recognizing the TV unless there is a second VGA monitor connected. Does this sound like a hardware issue?

My System SpecsSystem Spec
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21 Jul 2011   #2

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Sure sounds like it.

But first, go to Control Panel > Display > Change Display Settings > and click the Detect button with the HDMI connected to the TV.

I have been operating under the assumption that you should never "hot plug" HDMI connections. Turn off the laptop and TV, connect the cable, then turn them on.
My System SpecsSystem Spec
21 Jul 2011   #3

Windows 7 Home Premium 64-bit
 
 

Ok did that... I get "Available display output on: NVIDIA GeForce G105M" but does not detect the TV.
My System SpecsSystem Spec
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21 Jul 2011   #4

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Mmmm. Running out of ideas. I'm not ready to say it is a hardware issue because the port does work with VGA also attached so it could still be OS, or video driver issue.

First, with TV & PC connected and on, try looking through the nVidia Control Panel settings to see if there is a display setting you can play with.

If no luck there, then I would try: with TV & PC connected and on, and sure that the TV is set to the correct input, restart the PC.
Or turn the TV off and then back on.

The purpose of this is to try and get the input and/or display signal to get recognized again.
My System SpecsSystem Spec
21 Jul 2011   #5

Windows 7 Home Premium 64-bit
 
 

Tried tinkering with different settings in nvidia control panel and all other suggestions... even tried restoring system from a backup when everything was working fine. But, still only working with VGA attached. When I remove VGA... HDMI loses its signal. Very Puzzling.
My System SpecsSystem Spec
22 Jul 2011   #6

Windows 7 64b Ultimate
 
 

Could you post a snip of your NVIDIA settings? Specifically the info under
"Set up multiple displays" and
"View HDCP status" ?

Sounds like your LT got messed up as to what it's primary/main display should be...

And please update your system specs, specially mobo, BIOS version and Graphics card etc...
My System SpecsSystem Spec
22 Jul 2011   #7

Windows 7 Home Premium 64-bit
 
 

Ok... updated system specs. Do you want the NVIDIA snip with VGA and HDMI connected or just HDMI?
My System SpecsSystem Spec
23 Jul 2011   #8

Windows 7 64b Ultimate
 
 

Quote   Quote: Originally Posted by RockStar21 View Post
Ok... updated system specs. Do you want the NVIDIA snip with VGA and HDMI connected or just HDMI?
With both connected please, actually better: in both cases....
My System SpecsSystem Spec
23 Jul 2011   #9

Windows 7 Home Premium 64-bit
 
 

I noticed that the only way to have LCD and HDMI working at same time is to clone or extend desktop... when cloned, that means the HDMI is not actually running in HD right? Before the incident I could run both displays with different resolutions without extending desktop.

See png name for state of each snip.


Attached Thumbnails
HDMI output not working.-hdcp_vga.png   HDMI output not working.-sumd_no_vga.png   HDMI output not working.-sumd_vga_1.png   HDMI output not working.-sumd_vga_2.png  
My System SpecsSystem Spec
24 Jul 2011   #10

Windows 7 64b Ultimate
 
 

Quote   Quote: Originally Posted by RockStar21 View Post
Tried tinkering with different settings in nvidia control panel and all other suggestions... even tried restoring system from a backup when everything was working fine. But, still only working with VGA attached. When I remove VGA... HDMI loses its signal. Very Puzzling.
Normally this happens when you cloned the two. In this case, don't. What I dont get yet.. What is the third screen in your snips?
Make you lt screen primary and do not clone. We'll go from there....
My System SpecsSystem Spec
Reply

 HDMI output not working.





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