I did forget to mention that, but yes I did clear the CMOS before I
upgraded the motherboard BIOS.
When upgrading the motherboard BIOS, it also cleared the CMOS and
started at the factory defaults.
So what would cause my vertical frame rate to all of a sudden not work
with my TV? The only thing I have not swapped out is the motherboard.
I do have another motherboard (different chipset though) that has an
AGP port on it. I could hook up the power supply, video card,
processor and memory and boot to the MB BIOS. That would tell me right
away.
It seems strange that the motherboard would be damaged in such a way
that it could not sync up with the TV properly anymore, yet the
standard VGA works fine.
I also went through every singe setting in the MB BIOS and changed
everything (one at a time) that I wasn't sure about, then back again
with no luck.
Thanks for the advice.
Paul wrote:
> Terry wrote:
> > Hello,
> >
> > I have had a very stable system running a MAME cabinet for about 2
> > years now. I am running an Asus P4P800S with a Radeon 7000 video card
> > though an S-Video cable to a standard 27" TV. I had to remove the PC
> > and TV from the cabinet because I moved it from one room to another.
> > When I reconnected everything and booted up the machine, the BIOS
> > information and all the boot up sequence was black and white. I first
> > checked the S-Video cable and noticed that one of the pins was bent
> > over. I fixed the pin, but now when I boot up the machiine, not only
> > is it still black and white, but it is scrolling vertically very fast.
> >
> > This continues all the way up until after the welcome screen (I'm using
> > XP), then it corrects itselfs, and goes to full color and everything
> > looks great. I also connected a standard VGA monitor to the video card
> > and it looks fine during boot up. So the problem only occurs on the
> > s-video and rca jack outputs.
> >
> > I have swapped out the Radeon 7000 card with a new one. Still having
> > the same problem. I updated my motherboard BIOS with the latest, and
> > installed the latest Radeon drivers and I am still having the same
> > problem. I then swapped out the s-video cable with no luck, and I even
> > tried using a standard RCA style cable from the video card to the tv,
> > and it still had the same problem.
> >
> > I know the TV inputs are not damaged because after windows boots up, it
> > looks perfect.
> >
> > I have been messing around with this for about 4 hours now with no
> > luck. As I mentioned before, this exact setup has been working for 2
> > years flawlessly.
> >
> > It seems like whatever BIOS display drivers normally run (before
> > windows takes over) may have been damaged. But not the VGA drivers.
> > Could the motherboard have been damaged by the bent s-video pin,
> > causing the s-video and rca ouputs on the video card to malfunction up
> > until the windows XP driver takes over, when everything looks good.
> > That probably doesn't make much sense, but I am really lost with this
> > problem. My next step is to swap out a motherboard.
> >
> > Anyway, thanks for any input. I hope I can fix this problem soon.
> >
>
> The only thing I don't see in your description, is clearing the CMOS.
> Normally, you do that with the computer unplugged. (Unplugging the
> computer, is usually the first step listed in the manual.)
>
> The BIOS is supposed to use one of the standard VESA modes when the
> machine starts. Your "fast flipping" suggests a vertical frame rate that
> is not consistent with TV. Clearing the CMOS is the only thing
> I can think of, that might help. No guarantees, because I don't know
> if the video mode is stored in the CMOS or not. Storage at the BIOS
> level is CMOS (Southbridge RAM + battery power), and DMI/ESCD (stored
> inside the BIOS chip, and updated whenever the hardware changes).
> I don't think video cards store stuff for themselves.
>
> Paul
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