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Windows 7: HDMI output not working.

26 Jul 2011   #21
MvdB

Windows 7 64b Ultimate
 
 

That sounds like vga is cloned from the hdmi tv.

I would boot in Safe mode, delete graphics drivers, reboot with no tv or vga connection, let W7 re-install...
And hopefully, start over cleanly.


My System SpecsSystem Spec
.
26 Jul 2011   #22
RockStar21

Windows 7 Home Premium 64-bit
 
 

Quote   Quote: Originally Posted by MvdB View Post
That sounds like vga is cloned from the hdmi tv.

I would boot in Safe mode, delete graphics drivers, reboot with no tv or vga connection, let W7 re-install...
And hopefully, start over cleanly.
Before I do that... quick question. Wouldn't restoring W7 from a system image have fixed the problem if it were a driver issue?
My System SpecsSystem Spec
26 Jul 2011   #23
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

If the image were taken before the issue began to show then yes, it would.
My System SpecsSystem Spec
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26 Jul 2011   #24
RockStar21

Windows 7 Home Premium 64-bit
 
 

Quote   Quote: Originally Posted by TVeblen View Post
If the image were taken before the issue began to show then yes, it would.
Yeah... system was definitely working fine when image was taken.
My System SpecsSystem Spec
26 Jul 2011   #25
RockStar21

Windows 7 Home Premium 64-bit
 
 

What about flashing the BIOS... think that might be worth a shot?
My System SpecsSystem Spec
27 Jul 2011   #26
MvdB

Windows 7 64b Ultimate
 
 

Quote   Quote: Originally Posted by RockStar21 View Post
What about flashing the BIOS... think that might be worth a shot?

I'd try the other steps first, ie my previous post and if that does not work, go back to that previous image. Only flash BIOS if that does not work either...
My System SpecsSystem Spec
27 Jul 2011   #27
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

No, don't flash your BIOS. The only time flashing the BIOS is necessary is to gain some increased functionality or to correct bug fixes. There is a very small possibility that your issue could be due to a BIOS code bug, but pretty unlikely IMHO, as you had the functionality previously.

If you want to test, a better option is to reset the BIOS. If your issue were caused by some change to your BIOS settings, resetting would correct that.

The easiest way is to go into the BIOS, navigate to the last tab (usually the EXIT tab), and choose "Load Setup Defaults" or similar. It is always a good idea to write down your current settings before you do this in case you need to go back to any original setting.

A more thorough way is to do a "BIOS Reset", which on a laptop is equal to a CLR CMOS on a desktop. You do this by shutting down the laptop, unplug the power supply, remove the laptop battery, the press and hold down the POWER button for a good 30 seconds or more to drain all power from the motherboard. Then replace the battery, plug in the power supply and reboot.

Both of the above procedures work without altering the BIOS chip. Flashing the BIOS involves erasing the BIOS chip and rewriting new code to it and always has the potential danger of failing (turning your computer into a "brick", or a doorstop) and should only be performed for good reason.
My System SpecsSystem Spec
27 Jul 2011   #28
RockStar21

Windows 7 Home Premium 64-bit
 
 

Quote   Quote: Originally Posted by TVeblen View Post
No, don't flash your BIOS. The only time flashing the BIOS is necessary is to gain some increased functionality or to correct bug fixes. There is a very small possibility that your issue could be due to a BIOS code bug, but pretty unlikely IMHO, as you had the functionality previously.

If you want to test, a better option is to reset the BIOS. If your issue were caused by some change to your BIOS settings, resetting would correct that.

The easiest way is to go into the BIOS, navigate to the last tab (usually the EXIT tab), and choose "Load Setup Defaults" or similar. It is always a good idea to write down your current settings before you do this in case you need to go back to any original setting.

A more thorough way is to do a "BIOS Reset", which on a laptop is equal to a CLR CMOS on a desktop. You do this by shutting down the laptop, unplug the power supply, remove the laptop battery, the press and hold down the POWER button for a good 30 seconds or more to drain all power from the motherboard. Then replace the battery, plug in the power supply and reboot.

Both of the above procedures work without altering the BIOS chip. Flashing the BIOS involves erasing the BIOS chip and rewriting new code to it and always has the potential danger of failing (turning your computer into a "brick", or a doorstop) and should only be performed for good reason.
Ok, thanks for your input TVeblen... I'll avoid flashing. Definitely don't want to turn this somewhat minor issue into something catastrophic.

I tried resetting the BIOS a few days ago... no luck.
My System SpecsSystem Spec
27 Jul 2011   #29
RockStar21

Windows 7 Home Premium 64-bit
 
 

Quote   Quote: Originally Posted by MvdB View Post
Quote   Quote: Originally Posted by RockStar21 View Post
What about flashing the BIOS... think that might be worth a shot?

I'd try the other steps first, ie my previous post and if that does not work, go back to that previous image. Only flash BIOS if that does not work either...
Restoring from system image was one of the first things I tried when this happened... didn't fix. Just deleted drivers in safe mode... same situation. Guess we're running out of options here.
My System SpecsSystem Spec
27 Jul 2011   #30
MvdB

Windows 7 64b Ultimate
 
 

Quote   Quote: Originally Posted by RockStar21 View Post
Quote   Quote: Originally Posted by MvdB View Post
Quote   Quote: Originally Posted by RockStar21 View Post
What about flashing the BIOS... think that might be worth a shot?

I'd try the other steps first, ie my previous post and if that does not work, go back to that previous image. Only flash BIOS if that does not work either...
Restoring from system image was one of the first things I tried when this happened... didn't fix. Just deleted drivers in safe mode... same situation. Guess we're running out of options here.
No.... You should still try the bios reset, not flash...
My System SpecsSystem Spec
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 HDMI output not working.




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