Hi to everyone :-)
I have a Trident ProVidia 9685 PCI video card which has a tv-out feature. The problem is that the tv image (can be configured through a jumper or in the display properties panel) is very unstable, and if the image contains too much white it jumps like crazy, sometimes making the tv lose vertical sync. BUT the strange thing is that I've tested the card on four TV's, and works excellent on two, and awful on the remaining two. Being a computer card, it doesn't have that much capacitors and resistors as a TV or VCR, just chips and surface mount components everywhere you look. The card doesn't support PAL TV system, so I can't configure it for the wrong system. The only thing I noticed was some kind of variable resistor or capacitor (not sure) but it only has two pins and you can twist it more than one revolution. Tried adjusting that but only makes the jumping worse, so I left it where it was. Also tried the S-Video output, but no change. Since it works perfect with some TV's, I'm dumbfounded. Any ideas on what can be causing the problem, or what is the 'mistery part' ?
Thanks in advance, Emiliano F.