Won't power on with audio cable plugged in

I have a powerbook g4 17" 1.5ghz that I replaced the screen on. When I got the powerbook, the screen was cracked and had no audio cable connected from the sound board to the logic board so I took a cable from a 1ghz 17" and plugged it in. When the cable is plugged in, the laptop will not try to power on. All I get is a very brief sound from the cd drive. If I unplug the cable, it boots normally and works perfectly. I even unplugged the cable from the sound board with the same result. I'm thinking the cable itself has a short in it and I need to buy another one. I just wanted to confirm that this is probably the problem.

Mac1313:
I guess I will just have to leave the sound board unplugged and use a usb sound device for headphones or external speakers. I really appreciate your help though.
If everything else will work, that sounds like a workable plan. You can use a device like Griffin iMic as a sound input and/or output.
cornelius
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Won't power on with audio cable plugged in

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