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Sep 2, 2008 11:59 PM in response to drpatrickcsby Jan Hedlund,★HelpfulI doubt that an attempt to reset the Power Manager (or other tricks) will do any good at this point. Apparently, there was a short-circuit or an overload of some kind. It will become necessary to open the computer in order to inspect the electronic components.
If the computer cannot be repaired, you could remove the hard drive and install it into an external USB or FireWire enclosure. This makes it possible to save any important files to a modern Mac.
Further information about the electrical characteristics of the sound system can be found in the PowerBook 1400 document here.
Jan