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 PostPost subject: Powerbook G4 Video's Out        Posted: Thu Mar 26, 2009 4:54 am 
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I have a powerbook G4 titanium 1ghz. The computer seems to work fine aside from one thing. When the computer turns on all that happens to the screen is the backlight turns on. I was wondering if this is a common issue on these, I know there is the white spots problem, and if there was any way to fix it aside from buying a new logicboard.


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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Sat Mar 28, 2009 2:09 pm 
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Try a new display first. (If it has one) it could be the FL inverter. It's replaceable and you can find it in places like eBay.


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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Sat Mar 28, 2009 8:05 pm 
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Actually I did replace the screen on it at one point, and both showed the same problem. I originally thought the screen was bad but after i changed it and it was the same i doubted it.
BTW not sure if this changes things, but if plugged into another display(via DVI or svideo) it will work fine.


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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Sat Apr 04, 2009 10:57 am 
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Is it set to boot to an external display? oldish laptops have that choice.

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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Sat Apr 04, 2009 11:10 am 
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Toshua123 wrote:
Is it set to boot to an external display? oldish laptops have that choice.


Normally the backlight would be off if set to an external screen, its the case with old laptops I have anyway. Can't say it would be the same on that one for sure though.

You could try resetting the CMOS I suppose (they do have one right? :)). I find they work wonders in fixing stupid errors like these.

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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Sat Apr 04, 2009 3:18 pm 
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Andy wrote:
(they do have one right? :))


PRAM (and NVRAM on Intels).

[/offtopic]


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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Sat Apr 04, 2009 3:31 pm 
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Same thing in the end really :)

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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Sat Apr 04, 2009 6:30 pm 
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It does have the option to use an external and it will work that way, but it defies the purpose of a laptop.
I have tried to reset the pram and nvram in the past but it didn't do anything, but i willl try it again.


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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Sat Apr 04, 2009 6:37 pm 
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Rixel wrote:
It does have the option to use an external and it will work that way, but it defies the purpose of a laptop.
I have tried to reset the pram and nvram in the past but it didn't do anything, but i willl try it again.


If this happens its most likely the logic board, or a bad connection to the screen. It might be worth checking those out.

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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Sat Apr 04, 2009 7:05 pm 
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I replaced the screen cable at one point because I thought it might be the problem but, no luck.

I think that it's likely that the board is bad, but i still need to check the stuff from earlier


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 PostPost subject: Re: Powerbook G4 Video's Out        Posted: Mon Apr 06, 2009 1:08 am 
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I tried reseting the pram/nvram and the pmu. neither helped although i thought it did for a minute, the screen didn't seem to turn to the normal gray of the backlight by itself. More like the color of the grey screen before the apple appears.
I'm gonna try one more thing but it may not matter, I'm getting a black macbook and once the video card shows up, my PMG5.
Thanks for all the help.


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