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Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

PowerBook - please help, powerbook freeze electrical problem

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Member Since: Dec 10, 2008
Posts: 3
augusto is on a distinguished road

augusto is offline
i have a nice pbook g4 1.6 ghz with a good behavior

from some time now the battery stop working properly, when i wasnīt connected to AC the computer after some minutes the computer just powers off with no previews warnings, therefore i use the computer connected to AC most of the time,
the other day i remove the keyboard to fix a key following the instructions i put everything together again, and later a terrible problem appears
the computer suddenly freeze completelly and the display shows some weird vertical lines, i canīt do nothing but pressing and hold the power button to shut down.

trying to debugg de problem,

i notest that it happens when the computer get hotter,
so i played a dvd to reproduce the problem and after some seconds the problem appears
after this the computer get more freezy and even freeze when booting

i tryed to start the computer without the battery and for my surprise the computer didnīt power on
so hereīs is where i thought, is an electrical problem

i start the computer using a good conditions battery, i start several applications including, itunes, activity monitor, and i played a dvd movie
everything works nice however after an hour, preciselly when i remove the dvd disc the computer freeze again with same vertical lines in the screen.

so i want to be sure of what the problem is, i havenīt tryed the PMU reset thing yet, i will today, but besides that it looks is the AC power card isnīt?
i would like to be sure first to get a new one since in this days iīm very miserable, no money and no computer
any help will be appreciated

Augusto from chile
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Member Since: Dec 10, 2008
Posts: 3
augusto is on a distinguished road

augusto is offline
ok, i work today in this machine doing dvd studio pro, and other applications at the same time, the computer was fairly hot but it worked fine until let say four hours, until i did something like open another application or something can´t recall what i did anyway
i tried the PMU reset thing after this freeze, boot and i played an audio CD,
to try works fine, after some minutes i opened dvd studio pro and freeze again although this time it freeze whitout the vartical bar lines just freeze including the audio (as a loop)
then i reboot (with the cd inside) and freeze again in the booting but with the old vertical lines again

i feel that is an electrical problem, but i´m not sure
please hint hints!
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Member Since: Jul 06, 2008
Location: In a van down the river.
Posts: 661
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Mac Specs: 933 Mhz Powermac Quicksilver,1.5GB RAM, OSX 10.5, Tangerine 300MHz Clamshell, OS 9.2

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I highly doubt this is a hardware problem. This problems seems like it's a gradual one, and I assume it doesn't happen when you move the powerbook? Because if it happens when you move the powerbook, the video cable to the logic board is probably the problem. It COULD be the Logic Board or LCD, and if the symptoms are gradual, then it's probably temperature related.

Do me a favour:

Run the Apple Hardware Test that came with the computer and see what it tells you and let me know what it says.

Yes my name is Jaguar.
No, it is not a joke.
I don't find your "I'm a cheetah." joke funny.
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Member Since: Dec 10, 2008
Posts: 3
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finally i run the Apple H. test
everything passed
( the computer is formated i'm only using the os x, 10.4.11 )

- the computer doesn't freeze when the computer is move
(when the computer freeze nothing responds, therefore i doubt is some cable)

actually now i can make the computer freeze,
playing an hd movie (hdd file) and force it to play as fast FPS as the computer can,
then always freeze

it looks when high process is happening the computer freeze,
i'm using the temperature monitor software and everything looks under the normal
even when it freeze
however since the image freeze i can't see if the temperature software has increase its numbers.

i'm lost,

could the AC power card haves something to do with this, considering that
the computer doesn't start without the battery?

because if is not this, is the logic board right?, some hardware power unit inside the logic board? that obviously i can't fix..

please help!
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