PC doesn't show anything on screen.

[tphss]

I recently plugged my HTPC in my living room to a Plasma screen.

After solving the problems I had with connecting it to the screen, I'm encountering yet another problem:
Now, after shutting off the computer, when I start it again it doesn't show anything. I tried everything but I inevitably had to reset the BIOS (took the back-up battery out for few secs). And then it does work but I need to re-set all my preferences in the BIOS again.

I rather not reset the BIOS each time I need to turn on the computer


Only thing I could think of is that the first time this happened I had disconnected an external HD while the computer was off and then turned it on without the HD connected.
But I took measures and last time I "safely removed hardware" and only then shut down the computer. Still, turned it on now and nothing.

I also have the Corsair memory with the LED's on top, and they are not working properly (only few LED's do and only on one stick). So first time I thought the CPU/RAM is fried, but I reset the BIOS with the backup battery and it's all good again.

I'm running Windows 2000Pro.
Here are the computer's specs:
http://www.anandtech.com/mysystemrig.aspx?rigid=28875


Can anybody tie this to something?

THANKS!

 

[ZeroTM]

Did you connect the right video adapter cable into the right slot?

Often people make the mistake of plugging it into the onboard GPU rather than the installed one.

 

[tphss]

Yeah, it's connected to the X800XT AIW through DVI...
This doesn't make sense to me.

If this was as a result of something I changed in the BIOS then when I would "Save&Exit" from the BIOS it would show post. But after I changed what I needed it did.

So what else can it be?