I have several S900s in my office and I can't get one of them to send video to the monitor.
This looks like a classic case of an S900 "playing dead". I am not really sure what causes this specifically, but if you mess with S900s long enough, it is bound to happen. Something about the parameters stored in volatile memory getting messed up. Anyway. . .
There are a lot of procedures (some call them 'rituals') but basically you want to take all of the system parameters and get them as back to the original as possible. To be absolutely sure, pull everything off the motherboard except the processor and video card. Pull all RAM sticks. There is 16 meg of RAM onboard and that is enough to get video up. Disconnect all ribbon cables. Pull all PCI cards (except one video card). I also press the power buttons (keyboard and case) with the machine unplugged to get that last little "bump" of power out of the system.
Then reset the CUDA (tiny little gray button near the end of the bottom PCI slot) and when you press the CUDA button, hold it down for like 30 seconds.
Then plug it in and as you boot, hold down the keys to reset the PRAM several times. Release the keys and you should get video. . .it will be a sad mac b/c you have no boot devices, but it is where you want to be.
Replace the components one at a time. The CUDA stores information about the hardware in your system. This information gets updated every time your hardware changes. This information is stored in volatile (battery backed-up) memory, so it CAN get corrupted. The easiest way to completely screw up this information is to make several drastic changes to the hardware profile in a single reboot. So as you replace the components, install one component, reboot, install another, reboot. . . .actually many people reset the CUDA every time they add or remove hardware. Resetting the CUDA smply causes the hardware information to be recreated on the next reboot. But the key is to not take too big of a step in any one pass.
Oh and what Jeff said about the 3.3 volt line and the advice re: a possible dead battery can both play into this significantly and I'd check them both.
Have fun. . .it will live again!
-Greg
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