MacBookPro won't boot after firmware update; superdrive spins forever

I got my brother to switch to mac recently, but his MacBookPro has stopped booting. He told me that he ran a software update, in fact he said specifically "firmware update" on his CoreDuo MacBookPro, and as a result the machine does not boot. Instead it struggles to power on when the power button is pushed, and nothing happens except for a spinning up of the superdrive. It continues on like this until he holds the power button down again, stopping the spin.
As he put it, he ran a "firmware update" (sounds strange to me) and was told to restart, so he clicked restart. He was later instructed to do a hard restart, holding down the power key. He did so and has since fallen into the spinning drive problem, with no hints as to any cause.
Does anyone recognize this, and could someone please suggest solutions for trouble shooting? Thanks in advance. OS 10.4.x

This sounds like he got a kernel panic, as my FAQ* explains:
http://www.macmaps.com/kernelpanic.html
* links to my FAQ may generate me some compensation.

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