Enabling a VGA adapter blind?

[Guest]

Whilst trying to figure out why my graphics card couldn't be picked up by
windows i managed to disable the default VGA adapter meaning i now have a
blank monitor once it's booted up. Not the smartest move i've ever made but
can anyone help?

Safe mode is blank too and I can't see anything in the BIOS which would
help. I also tried pressing F8 during reboot to get a command prompt but it
freezes and says "OS missing", which really doesn't seem good but makes no
sense seeing as it will still load windows if left alone, but with the
display turned off.

I've figured out how to get to the system restore menu via keyboard
shortcuts but does anyone know how to navigate through the system restore
menus when you can't see them? How many times do i need to tab and are the
default confirmations "Cancel" or "ok"?

Any help much appreciated.

Rob

 

[barry]

restore is default, so alt+n for next.
list of dates dispalyed, cursor left to select a date, which also selects
the newest restore point. Alt +N for next. alt+N again.

thats as far as I got as I dont fancy restoring my pc

so:
alt + n
cursor left once
alt + n
alt + n



"Rob_completely_in_the_dark"

 

[Guest]

Thanks for the help, though i think i'm letting my end down a bit. There
must be something else in my "All Programs" list above "Accessories" since
the sequence of buitton presses i'm trying doesn't work. What i'm doing is:

Pressing the "Windows" button between Ctrl & Alt
Shift+P, enter (All Programs)
Shift+A, enter (Accessories - unless there's something above it in the list
which starts with A?)
Shift+S, enter (System tools)
Shift+s three times (to toggle down from system info to scheduled tasks and
then system restore)
enter

then the alt+n, left cursor, alt+n, alt+n as you describe. I hit enter at
the end of that and nothing happens. Looking at the Microsoft help it
suggests there may be an option window which pops up after selecting the
restore point so i've tried pressing enter after each step in the alt+n stage
of the process. No joy.

Is there any way of forcing a DOS prompt somewhere? F8 during boot just
says "OS missing". :-(

Thanks

Rob

 

[Guest]

The problem is now sorted! I had to borrow a graphics card from a mate's PC
and fit that. When windows booted it picked up the new card and used that
instead of the default VGA adapter. That was enough to let me do a system
restore and then re-install my original card.

Cheers

Rob

 

[John Ferrell]

Perhaps I should have posted this here but I posted in the hardware section.
I hate cross posting, but I think this one deserves it, here it comes....

There seems to be a fairly common problem among XP users. I refer to it as
the "Blank Video" problem. It does not happen often and there are assorted
ways out of the problem. An orderly shutdown is impossible so the risk of
file damage is a given with a power switch shutdown.



The ways to recover:

Boot safe mode (not always possible) and set video refresh rate from UNKNOWN
to Optimal.

Reset BIOS.

Before SP2 you could recover by booting the XP original CD. No luck with
that recently.



The problem is aggravated by installing an LCD monitor.



It appears to me that the problem is that a rogue program or condition sets
the video adapter to a mode that the monitor cannot execute. A reboot brings
you right back to the problem.



Here are some possible solutions:

The ability to limit the video settings that XP can select inside XP.

The ability in the video driver to ignore mode requests that are out of
range for the installed monitor.

The ability of the display to convert an out of range signal to something
that at least displays.



This may be a "high end" hardware type of failure. The video drivers for
minimum function hardware may already do this. The most likely fix should
come from the video driver (video controller people). It would be easier to
implement there and they are really the controlling entity. The big problem
is that they all just quit when the problem occurs! The monitor should
indicate "settings out of range", they driver should say "invalid mode
request" and the supervisor should say "bad response from display system".



The most dangerous aspect of the problem happens on my machine in that files
are sometimes damaged in the crashes. Sometimes these files are impossible
to recover without a regen of the system!



So far I have had two XP crashes that required a total regen. All of the
hardware except the monitor has been changed out. XP and the monitor are the
only components left and at this point I have the monitor out of the
configuration. I have not seen a failure since I reverted to an ATI 9600
All-in-Wonder video controller and a Viewsonic PF790 Display.



I will keep it this way until I better understand the XP & driver controls.



I don't want to own up to how much time I have spent on this bug, it is
embarrassing!



Can someone tell me how to keep XP from allowing a mode that my LCD monitor
(Microtek 710s) cannot execute? Or how to keep the video controller from
using a mode that will not work on my monitor?