14" iBook G4 will not power up.

Question

I left it on last night and when I got home this morning it looked like it was asleep so I moved the mouse, hit the space bar and nothing happened, the glowing sleep light was still on. I waited a few minutes and tried again. Being impatient I took the battery out and unplugged it. I waited 5 hours and went back, put the battery in, plugged it back in and it still does nothing. I did the ctrl, shift, option, power and got nothing and I also reset the PMU or whatever that is called. I also should mention that my power cord is showing a green light and my battery is only showing one flashing green. Can someone help me please? Thank you!

Answer 1

Could be the power adapter is not working properly; I say this because a
few other users with a green indicator light on their portable's power cord
and a low battery, appeared to have a bad AC power adapter. Some also
had a bad or difficult acting battery. So, maybe the AC power adapter is
no longer charging the battery; and if so, that'd be a definite no-go.
There are times when the power adapter's plug isn't firmly
pressed into the iBook's power port; or if the port is loose,
that may indicate a different repair could be needed. If
power isn't getting to the battery, that could be a circuit;
a bad battery, [and or] a bad power adapter.
This is matter of troubleshooting hardware now; and later on, you may
need to do some maintenance to the system after it is running again.
Another item that could be at fault, may be the DC-in board; that would
be one of the three things that could be causing the power issues. The
other two, being the AC Power Adapter, and the battery. When you get
into these matters, resetting the PMU wouldn't directly change much
unless the microchip that is the power management unit, was corrupt.
Then, you'd reset it so the charging and power management systems
could try and cycle to charge the battery. But if the DC-in circuit is
the cause, that is a part near the logicboard and can be costly. One
indicator of a bad DC-In board is if the AC Adapter's plug is loose in
the computer; but it need not be loose to have an internal defect.
So, you may need to either find another known-good working AC
power adapter that'll work with your computer, and also, a working
compatible battery; then you could see if the system sees these
and responds properly. If the parts are good and they don't act
right, you may have to reset the PMU. Also, if a good battery does
not show up properly in the menubar's battery gauge, you can reset
the gauge by running the computer to zero power on battery, and after
a low-battery warning appears while using the computer, keep it on
until the machine goes to sleep. Then, plug in the AC Adapter.
Of course, this "calibrates" the battery; it would do no good if the
battery is not yours to continue using with the computer, since a
new battery should be similarly calibrated initially and later in use.
With the computer running, you can look into System Preferences>
Energy, to see the charger (if on AC power) and the battery status;
charging cycles, milli-amphours, capacities, and other info. This can
tell you when a battery is near end-of-life, before it fails. A little late
now, but the information could be used at another time, and in another
computer if you wanted to check your battery in another computer.
A qualified Apple certified technician or service center which knows
these machines could troubleshoot the adapter, the battery & iBook.
Hopefully this helps some. Best wishes and seasons greetings.