PowerBook G4 17" 1.67 GHZ not booting up

Question

I have a PowerBook G4 17" 1.67 GHz and it's not booting up.
I've already tried resetting the PMU but it still doesn't boots up.
Any ideas?

Answer 1

Of two different ifixit pages inside the link above, one covers 1.0 + 1.67GHz 17" models
while the other covers 1.67GHz Model A1139 / with 1680x1050 screen resolution. This
appears to be what you say you have. High-res display, plus dual-layer superdrive.
"Released in October 2005, the G4 Aluminum 17" 1.67 GHz High-Res came equipped with ATI Mobility Radeon 9700 graphics standard. Features included a standard SuperDrive, a DVI port, and both FireWire 400 and Firewire 800 ports. The LCD used by the 17" PowerBook G4 Al is the same used as in the 17" iMac of that era, but with a thinner backlight..." ifixit.com - about High-Res model. (Prior to Dual Layer Superdrive?)
•High-Res 17" PowerBook G4 1.67 with D/L superdrive:
http://www.everymac.com/systems/apple/powerbook_g4/specs/powerbook_g4_1.67_17_hr .html
While it is my untechnical feeling that part of the problem may be the PRAM battery on
the logic board (these do not last, and can affect bootup) could be a contributing factor,
the computer should see an expert or someone knowledgeable and skilled to check it.
The iFixit repair page cover the possibiliity of PRAM battery replacement, as shown.
http://www.ifixit.com/Device/PowerBook_G4_Aluminum_17%22_1.67_GHz_%28High-Res%29
A more knowledgeable person in theory, may be able to determine a course of action
based in troubleshooting &/or testing results. With an older computer, however, to find
a specialist or someone professionally capable of this level may be difficult, or costly.
There is little one can do about it remotely. What other computer do you have?
If the PowerBook G4 17" 1.67GHz portable Apple computer does not boot at
all, it would be nearly impossible to use Target Disk Mode (FireWire) to access
the unit and get any of your user-created files out. But if that could work, at least
you could remove a copy before attempting any service or do-it-yourself repairs, etc.
Someone handy with computer experience, at a college or other school, may know
of a capable person with portable Apple PowerPC experience. However  I would
venture to suggest you'd be very lucky to find someone qualified and not too costly;
then there is a matter of replacement parts. Could be more than a PRAM battery, as
these portable computers age, other parts often fail due to wear. The hard disk drive,
the battery, the power adapter, the DC-in board. Electrical contacts inside the case
can wiggle loose from years of handling. This alone could cause it to not start up.
According to Everymac.com, they show five different 17" PowerBook G4 models
http://www.everymac.com/systems/apple/powerbook_g4/index-powerbook-g4.html
to include earlier 1.0GHz,1.33GHz, 1.5GHz and two 1.67GHz models... If yours is
the Dual Layer SD with High-Res display, that limits the repair guide to one page.
So you'd need to check the one you have, before considering a repair option that
would include correct parts for a specific build version, model identifier, year, etc.
Not sure if this helps, though...
Good luck & happy computing!