That's the verdict on my Dell Inspiron 4000 -- the motherboard has failed in some way. They tried swapping everything that could be swapped, but the system continued to freeze during startup.

From Dell's support website, I gather that this freeze-up problem has afflicted many Dell systems, which is why I probably won't make my next system a Dell. And I have to wonder at the problem reasserting itself so quickly and dramatically after I had the laptop in for replacement of the video cable.

I will give Dell credit for one thing -- I have already received my replacement power supply -- less than a week after I learned about the recall. Now if I only had a healthy laptop to plug it into.