I plugged in a new adapter and it blew, now the computer won't boot. No power to adapter. Any suggestions?

If you have a second known-good power adapter, you could see if the computer

will react to the suggestions on resetting the Power Management Unit (PMU)

in the Support article below...

•Resetting PowerBook & iBook Power Management Unit (PMU)

http://support.apple.com/kb/ht1431

And while it may not help, especially if there is hardware damage inside the 'Book

there are times when a reset of the PRAM can help where 'reset PMU' does not.

•About NVRAM and PRAM:

http://support.apple.com/kb/ht1379

Without access to a known-good charged battery, to further test the computer, the

answers diminish somewhat; as recovery of data on its HDD is another task.

So, if the computer is DOA, and unresponsive, you may have to consider removal

of the hard disk drive, to use a USB ATA/IDE drive adapter cable kit, on a bare HDD

to get access to the contents, for retrieval. Or get a correct external housing for

that vintage hard disk drive so you can run a cable to it. This would involve extra

steps, to be sure a housing or powered case, would see the HDD. Also jumper pins

may need to be set, if the HDD were to be used in an enclosure.

{And, IF the PowerBook (PPC) turns out to be a MacBook (intel-based) then see

instruction on "How to reset SMC" http://support.apple.com/kb/HT3964 instead.

Also, a different USB wire kit - for SATA HDDs - would be needed, not ATA/IDE}

Not sure if this helps all that much.

Good luck & happy computing! 🙂

edited 2x