"no signal digital"

[johnc13]

The error message is not: ‘no video signal during POST’ but simply
"no signal digital"

windows vista home premuim 32bit
nvidia 8600 gts with each of the last two nvidia drivers tried
Asus P5N-E nForce 650i SLI
Intel(R) Core(TM) 2 Duo E6850 CPU @ 3.00GHz

System worked fine the first four months I owned it (until about three or four
weeks ago).

Now when the system is turned on, the boot process appears to work fine
but just before the vista login prompt the message "no signal digital" is
displayed and then the screen goes to black.

Booting to safe mode works as the system reverts to vga. I then remove
the nvidia display driver and reboot. The system boots with vga support,
but at least I can use the system without having to use safe mode.

I have tried downloading and installing the latest nvidia display driver, but
the problem persists.

I have tried running a few different virus scans to no avail. I've ensured
the
microsoft updates are current.

And I have tried rolling back to restore points prior to the first sign of
the problem.

Suggestions?


Thanks,
johnc13

 

[johnc13]

I forgot to mention I've also swapped out the nvidia 8600 gts with a new one
and the problem continues.

 

[Tim Slattery]

The error message is not: ‘no video signal during POST’ but simply
"no signal digital"

windows vista home premuim 32bit
nvidia 8600 gts with each of the last two nvidia drivers tried
Asus P5N-E nForce 650i SLI
Intel(R) Core(TM) 2 Duo E6850 CPU @ 3.00GHz

System worked fine the first four months I owned it (until about three or four
weeks ago).

Now when the system is turned on, the boot process appears to work fine
but just before the vista login prompt the message "no signal digital" is
displayed and then the screen goes to black.

Booting to safe mode works as the system reverts to vga.

It sounds to me like Vista is trying to use the digital (DVI)
connection to your monitor, but your monitor is on the VGA connection.
In safe mode, right-click the desktop, select "Properties", and click
the "Settings" tab. Use the drop-down to find which monitor (1 or 2)
is the analog monitor. (It's probably 1). Then select that one, and
click "Use this device as the primary monitor".

 

[Tim Slattery]

It sounds to me like Vista is trying to use the digital (DVI)
connection to your monitor, but your monitor is on the VGA connection.
In safe mode, right-click the desktop, select "Properties", and click
the "Settings" tab. Use the drop-down to find which monitor (1 or 2)
is the analog monitor. (It's probably 1). Then select that one, and
click "Use this device as the primary monitor".

Dang...I just thought of a simpler solution. Your monitor is set to
get its input from the digital connection, but there's a VGA cable
connected and no digital connector. Just bring up the monitor's menu,
and find where that selection is made. The selection may be made by a
button on the front on your monitor (it is on mine). In fact, I like
that. Somewhere along the way, somebody bumped a button on the
monitor, that would do it.

 

[johnc13]

Tim, thank you for your help.

I'm afraid I've caused some confusion. My monitor is a:
ViewSonic VX2235WM 22" Wide Color TFT Active Matrix LCD Display 1680x1050

It is connected to the nvidia 8600 gts via one of the two dvi ports on the
card.
There are no vga ports on the nvidia card.

As you can tell, I'm not well versed in video. I was trying to convey that
the image
I get when I remove the nvidia display driver is vga quality rather than the
high
resolution evga I was getting from the nvidia card before the problem arose.

It's as though vista is confused by the nvidia driver. When there is no
nvidia
driver present (or while in safe mode with the driver present), vista uses a
default driver which only supports low resolution (my use of the term "vga").

Could there be some kind of corruption in the portion of the vista OS which
reads the display driver? Or a problem in the registry? Or?


Thanks again,
johnc

 

[Not Me]

a setting in the monitor may be wrong, or you are connected with a loose/bad
cable that is reverting to vga because the cable is not transmitting the
proper signal