At 10:09 AM 11/02/1999 +0100, you wrote:
Jerry-

Have you tried a different monitor?  I was looking at this, and thinking
that the similarity between the "blank screen" modes has got to be the
refresh rate.  Is it possible that some part of the monitor is bad?
Forgive me if this is a remedial answer, I'm fairly new at this.

Eric Wertman

>Hi folks,
>
>I am trying to diagnose a display problem on an old AST PC and I'm not
>totally sure of it's history, here's the deal;
>
>1. On-board ATI Rage Pro graphics card - P200MMX, 32MB RAM, sound, CD-ROM
>etc.
>2. On boot up it will display nothing (in DOS) - blank screen, however it is
>booting.
>3. It will then happily go into Windows at 640x480
>4. It will not open a full screen DOS box from windows (goes blank) but will
>open a windowed one.
>5. It will go blank if I change to 800x600
>6. But strangely, it will display in windows at 1024x768.
>
>I tried adding a different PCI graphics card, an S3 and I only got a repeat
>of the same problem, so it kinda eliminates the graphics card from the
>equation.

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