I'm having what seems to be a power problem with my 15-inch 1.5GHz PowerBook
G4 (A1106) running OS 10.5.8. I put it to sleep on Saturday after running it
off battery power for awhile; I'm guessing about 20% or so of the battery's
charge was left, but that's just a guess. It sat all day Sunday. This
morning (Monday) it wouldn't wake up. Flipping it over, I saw that the
battery appeared to be dead, with just one flashing LED. The PowerBook would
not wake up even after the power adapter was plugged in.

I unplugged it and removed the battery, thinking that might resolve the
machine's confusion, but then it didn't do anything after I replaced the
battery and plugged it in. Resetting the PMU did nothing. I read somewhere
that it wouldn't boot until the battery had at least a 10% charge, so I
thought maybe I just needed to wait. But after a couple of hours, the single
flashing LED indicated that no charging was happening. Then, a couple hours
later, all the LEDs were lit, and the computer fired right up and showed a
fully charged battery. However, both coconutBattery and SlimBatteryMonitor
say that the battery is not charging and that the power adapter is
disconnected, even though it's plugged in. The computer seems to run fine
off the battery. Repeatedly resetting the PMU has made no difference.

Both the battery and the power adapter are aftermarket and fairly new. The
power adapter is 65W and works fine with another PowerBook. It also fits
pretty tightly into the problem computer's socket, and doesn't wiggle. I'm
starting to suspect that the DC-in board is the culprit, but what do you
folks think?

-Peter

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