G450 DUALHEAD PCI + XP pro problem

[Just_me]

Hi,

I have a refurbished HP Vectra VLi8 DT
with the following parameters:
PIII500Mhz Katmai CPU
384 MB SDRAM
embeded Matrox G200 8MB video card
Intel 82443BX/ZX Chipset ,
and I recently decided to "upgrade" it with a
Matrox G450 DUALHEAD PCI 16MB TV-out card.
I'm using XP pro without any service pack on it.
I've tried several different drivers from the matrox support site, but I can't
make neither dualhead clone feature, nor dvd max to work at all on my
tv. The card doesn't seem to send any signal to the tv.
I have dualhead and dvd max features in windows display setting enabled.

Can anybody help me pls?!!!

p.p. I'm dealing with this problem for quite some time without any progress,
except re-installing windows several times

[gt40]

try adjusting the colour depth of the main screen.
I vaguely remember something about tv-out only working in 16bit colour (or is that 24?)

[gt40]

also, the main monitor should not have a resolution above 1024x768.

[Nowhere]

Hmm...perhaps you have a cable for G400? TV-out cables for G400 and G450/550/P750 are quite different.
Checked if the second output works with other monitor?
Also...I seem to remember there were some G450 "Single Head" models...which, while physically having two outputs, had one disabled.

[Just_me]

try adjusting the colour depth of the main screen.
I vaguely remember something about tv-out only working in 16bit colour (or is that 24?)

Colour depth didn't help.
The lower resolution neither.

[Just_me]

My cable is home-made. I used this schematic:http://pinouts.ru/VideoCables/matrox_tvout_pinout.shtml.
The curious thing, sorry I didn't mention it before, is that when I installed the card for the first time it worked just fine for 2-3 days and then suddenly the signal was lost (I haven't made any configuration changes). I thought that the cable is gone but after several days of trying different drivers I get the picture, but it was very blurry and then once again was gone. As I understand your suggestion is than I might have hardware problem with the
secondhead?

Hmm...perhaps you have a cable for G400? TV-out cables for G400 and G450/550/P750 are quite different.
Checked if the second output works with other monitor?
Also...I seem to remember there were some G450 "Single Head" models...which, while physically having two outputs, had one disabled.