i've seen this problem somewhere, but i can't find it again...
i'm an (un)happy user of voodoo2 from 2 days. the only problem is that my monitor doesn't display blue component from voodoo, only green and red. all colours are messed up. i've checked configuration, gamma settings and so on. i have pIII450 with w98, and newest fastvoodoo drivers installed. dunno what's the problem... please, help.
btw, all 3d stuff, glide and dx is working great, the only problem is with missing blue component. i think it's it, because no blue component is displayed, and i don't believe it's software problem...

Hmm...

Did you carefully check the cables?

It takes only one pin to be malformed (either Monitor or Loop-Through Cable), in order to disable a Color Channel.

In rare Cases, one of the Pins might also be found 'retracted' somewhat, meaning it is possible for the normally fixed Pins to move inside the Connector housing, thus preventing contact. (can be solved by either carefully pulling it out again, or by opening the Connector casing if it already went too deep inside).

If none of it is the case, it could be a touchy/broken wire in either of the Cables itself (carefully move it around, or test with another Cable).

If none of this helps, you could actually test both the Monitor for failure (try on another machine, or try other Monitor), as well any possible damage on the Voodoo2 Card itself (check the Pin-Out going to the Connectors on the PCB, which could be damaged or short wired by being malformed).

don't think it's the loop cable, as the problem only troubles him when using the voodoo for gaming..maybe it's the ramdac/one of the 3 voodoo2 chips. here the 3dfx rampage prototype problem (changed colour channels) comes to my mind, maybe it's something like that..?

Hmm  ??? Strange one this.

The only problem I had with Colour and a Voodoo2 was when I had some really old GLQuake patch for quake.  When GLQuake launched, everything was in blue, no green and red at all!  Blue Quake!  ::)
But seeing that, that was a software problem....

Are you using that colour software in windows, it's called 3Deep.  It comes with the banshee.  If you are using that, it may have something to do with that.  If not, try getting a copy of it and installing it.  See what that does.  That's all the advice I can give on this matter.  :-[

i've found that my cable is broken... one thing... i don't have the pass-through connector yet, so i'm just simply changing the monitor connection between on-board trio3d and voodoo2... the cable is broken, so i have to move it around to get a blue colour from trio3d, but i haven't seen blue colour on my voodoo2 yet... maybe it's a matter of cable, i'll try another one today, maybe it's because of missing pass-through?... but it shouldn't be, am i right? i'm only hoping that voodoo2 itself isn't broken...

Before you can come to any conclusions on the card, the best thing would be to get a monitor with a good monitor cable.  Also acquire a decent stable pass-through cable.
Simply switching the monitor cable between the two cannot be considered as a long-term ideal.

Once you get the cables, you will be able to determine if there are any problems (if at all) with the cards.  ;)

And you're right, the cable indeed must be faulty then, since the missing Loop-Through is no factor.

(your way of doing is was correct, just a bit inconvinient)

Possibly, the frequent switching of the Cable caused the damage...

well... i don't think that switching cables was a problem... because on first time it didn't worked as it should be... i'll try third cable today... but interesting thing with the second cable... the first one, that was broken, had one pin missing... unused propably... second one had three pins missing... unused? it's working on every computer/monitor except mine... on board trio3d is sending synchronization signals on those two pins... third cable which i've got has got one pin missing... and i just can't get a cable with all pins... maybe voodoo is sending blue component on that missing pin? no, i don't believe it... but if it won't work, i'll just buy other card... i can't find anything above voodoo2 on pci... are those cards that rare? strange again... whatever, i'll propably buy voodoo2 sli;)

and one more thing about that second cable... trio3d was sending synch signals through that two missing pins, so the display was messed up completely, but voodoo2 worked with it... again, without blue component... any questions?:)

some pins are unused, right. maybe fasteddy's page will help you:
http://homepage.ntlworld.com/edwardbamford/V2/index.htm