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Main => Monitor/Video Forum => Topic started by: Popcorrin on November 17, 2005, 12:06:02 am

Title: Trident card doesn't output a picture unless hooked to a pc monitor?
Post by: Popcorrin on November 17, 2005, 12:06:02 am

I am having a little trouble with my trident card.  If it is hooked to a pc monitor when booted up it will output a picture.  If it is not hooked to the monitor at boot up and the monitor is plugged in later it will not output a picture.   Also when I hook it to my jpac it will not output a picture.  I have to first hook it to my pc monitor and then after it boots up I can hook it to the jpac and it then outputs a picture.

I am assuming that it waits to initialize until it gets feedback from the monitor and in the case of an arcade monitor there is no feedback. 

Is there a way to fool the card.  I know that 4 of the wires on a vga connection are for monitor ID.  Can anything be done with these to cause the card to initialize and output a picture without hooking it to a pc monitor?

Title: Re: Trident card doesn't output a picture unless hooked to a pc monitor?
Post by: Jess-- on November 18, 2005, 10:33:36 am

from memory one of those leads needs to go to ground to tell the card there is a monitor attached, used to get the same thing on cheapo servers I ran using S3 video cards, they used to refuse to boot with no monitor attached, I wound up linking the pin to ground on the card itself.

Title: Re: Trident card doesn't output a picture unless hooked to a pc monitor?
Post by: Popcorrin on November 18, 2005, 04:56:27 pm

I was hoping it would be something that simple.  Now all I have to do is find the right lead. 
Do I have to worry about grounding the wrong monitor ID wire?

Title: Re: Trident card doesn't output a picture unless hooked to a pc monitor?
Post by: Jess-- on November 18, 2005, 05:00:19 pm

I will have a look over my notes from the time and let you know what I found? can probably tell you which pin to gnd

Title: Re: Trident card doesn't output a picture unless hooked to a pc monitor?
Post by: Popcorrin on November 18, 2005, 11:33:52 pm

I would extremely appreciate it.   Thanks!

Title: Re: Trident card doesn't output a picture unless hooked to a pc monitor?
Post by: Jess-- on November 19, 2005, 07:04:46 am

Hope this helps.


Pins / ID

4

Title: Re: Trident card doesn't output a picture unless hooked to a pc monitor?
Post by: Popcorrin on November 19, 2005, 11:21:27 am

Awesome,  thanks! ;)

This could also come in handy to prevent certain resolutions being displayed on monitors that can not handle it.  I have an NEC monitor that certain pc games will try to send 1024x768 to, thus overdriving it.

Title: Re: Trident card doesn't output a picture unless hooked to a pc monitor?
Post by: Jess-- on November 20, 2005, 06:22:54 am

should say that these are old (seriously old) standards, but modern video cards should still look for it because of backwards compatibility

Title: Re: Trident card doesn't output a picture unless hooked to a pc monitor?
Post by: Popcorrin on November 21, 2005, 12:25:36 am

I tried grounding the wires and for whatever reason it didn't work.  Looks like I will have to find another video card.  Thanks for the info.