PowerPC :: Powerbook G4 Power - LCD Backlight Comes Back On But It Does Not Displayed?
Oct 2, 2007
I acquired a gimped Powerbook G4 from one of our 'daughter' companies. The laptop works fine when using the A/C adapter. If I unplug the A/C adapter while the power is on, the screen/keyboard lights will go off. However, the hard drive is still spinning. If I plug the A/C adapter back in, the LCD backlight comes back on, but it does not display what was on the screen. I have to hold the power button down for a few seconds to power it down completely. Upon turning it back on, everything works fine again. Does this sound like a battery issue or motherboard problem? I have checked the battery serial number against the recall list and this one is supposably good.
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Mar 16, 2009
I unplugged my PowerBook and the screen and backlit keyboard dimmed and then brightened back up. Was there a power surge inside my PowerBook?
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Mar 19, 2008
My girlfriend has a 12 inch Powerbook G4. She noticed that the battery life was starting to dwindle. Tonight, she tried using it. It wouldn't power up. The battery indicator showed one flickering power circle. The adaptor has the green circle on it, indicating the battery has a full charge. However, the computer won't charge up.I've read the 12 inchers don't have separate PMUs. Could that prevent the machine from starting? She was using it earlier this evening, as she e-mailed me pictures from our vacation.
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Oct 23, 2006
My G4 Powerbook 17" 1.5mhz stays on most of the time. Only thing that really gets any rest is the screen once in a while. For this reason, is it better to just power it off the powersupply and take out the battery? Any harm done in having the battery there and charging for extended periods?
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Jun 19, 2007
My powerbook will not power up, I have already ruled out PRAM battery, am i looking at buying another logic board?
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Jan 1, 2007
It got REALLY hot. I had to snap my hand back after touching it, and my hand was red. I noticed it had turned off, so I went to see what was the matter. It felt hot enough to possibly catch fire.
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Aug 17, 2008
The plastic piece around the dc jack is broken and blocking the power adapter from being able to charge. Is this piece required or can I remove it? Does anybody know where I could get a replacement piece?
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Sep 3, 2008
I've recently acquired a (rather old) PowerBook g3 (Lombard if you are wondering). However, I have by yet acquired a power cord for said notebook.
The laptop was free, but the power cord will apparently not be so I expensive. Basically PowerBook will be used for writing papers, other non-Internet stuff I need to do this year (senior in high school). Right now I am using my iPod touch as my primary computer. My question is, should I go ahead and just pay the money for a power cord or should I just suck it up and wait until may-isu when I get a new notebook? Obviously I'd like to avoid paying a lot but would the money for a new cord be worth it? If not I could always use google docs for papers when I'm not at the house, how advantageous would having an actual notebook be
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Mar 31, 2009
I recently tried to upgrade my powerbook with a new HD (see but forgot to format the drive before trying to install the operating system. I gave it another go last night but with the new disk installed and everything back in place, it would not power back up. I took it to bits again and checked everthing was connected including the little ribbon cable from the keyboard but still nothing. I put the old disk back in with the same results. there is no response from the power key at all. Everything is pushed home where it should be so I'm a lttle worried about what could have happened.
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May 16, 2009
I have a PowerBook G4 with a broken power connector, and a brand new hard drive for my Mac Pro which I bought to transfer the files to. What is the best way to do it?- I could attempt to open the case and remove the harddrive myself, get a 2.5-to-3.5-inch harddrive adapter for about $10, and put it in my Mac Pro. From what I've read this would work, although I've never tried anything like it and I'm not sure how hard it would be.
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Oct 14, 2009
I have a PowerBook G4 1.67 that shut itself down sometime during the day yesterday, and will not power back up. It's completely unresponsive to the power button, with no signs of life whatsoever.
I've tried resetting the PMU. There has been no new hardware or software installed. This has been tried with 2 batteries, and 2 AC power supplies.
There is inconsistency with the color of the AC power supply tip, as it doesn't seem to indicate the strength of the battery. Regardless of which battery or how much charge is left, the tip is Green, and will flicker Yellow very quickly once, when plugged in. It was Green following the initial shutdown, Yellow when I placed a dead battery in it, and then eventually turned Green. Now, it seems permanently in the Green / flicker Yellow state.
It did fully charge one battery while like this.
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Jan 25, 2010
I have a 12 inch powerbook g4 Aluminum and the screen is dim,and discolored in some areas but it is really bright at the bottom like it supposed to be brighter.is it the backlight and inverter or is it just the lcd? it works flawlessly other than that.
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Dec 5, 2010
Is it possible to mod a PowerBook to use the MagSafe adapter instead of the regular adapter? I'd be willing to do it myself, but I haven't found any real consensus on whether or not it's even possible.
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Dec 24, 2007
Was on my PB last night, went to pick the power cable up by the transformer and it emitted a spark, a little bang and then some smoke.
It was very very hot. It was late, and I was slow to react and it remained plugged into the computer after this had happened still charging it as if nothing had happened.
The computer is fine too.
Basically, I'd like to know if anyone has had a similar issue happen to them, and if I should get a new power cord? Or if you think it is okay to carry on using this one.
I haven't plugged it in since last night to see if it works or not, I am worried it will break the lap top.
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Nov 26, 2008
Does anyone know if there's anyway to turn on an aluminum powerbook without the power button? I mean is there any keystroke combination that can turn a powerbook on?
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Jun 22, 2007
My Powerbook will not power on. I have followed some instructions on disconnecting the PRAM battery and that did not work, any ideas? I just stopped coming on without any explination.
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Jul 23, 2007
The 45 watt power adapter on my 12 inch powerbook is on it's last legs. I have access to a very cheap replacement but it's a 65 watt adapter that came with the 15 & 17 inch models. Is it safe to use this as a replacement?
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Aug 29, 2007
I searched forums etc. I have a 867 12" powerbook. The problem is that it will not turn on at all. I took the battery out and pressed a few key and it worked for a little while. Now when I plug it up to recharge the light goes green to red then off. I found a so called reset button on the apple site and lifted the keyboard and it is not in site.
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Nov 1, 2006
So I've got a powerbook G4, thats 8 days past its warranty. Conveniently, it now won't turn on. It won't wont boot from CD. If I turn it on, I get a gray screen that usually just turns my computer back off, if thats not the case I get a screen that shows the finder icon and a question mark and then turns off.
All it will do is boot into open firmware mode. Currently the install disc is inside of it and I've tried booting the cd using "cd:, bxi" and "dir hd", and it can't open both. Does anyone know how to wipe the HD, and start the installer using firmware? Otherwise, I think I'll have to take out the harddrive and plug it into an external case and then wipe it.
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Oct 29, 2005
so today was the day to replace the broken harddrive inside my 12" Al Powerbook and naturally I've ballsed it up.
The problem came at this stage of pbfixit's instructions. In pulling the power cable out of it's socket, I've pulled the bloody socket off the board.
So this is bad, that much is clear, and I need help, and lots of it. What's the best course of action now? It's not under warranty or anything, it was second hand to begin with.
For what it's worth, if anybody else finds this while searching for dismantling instructions, it's actually not too difficult. I would change this section of the instructions though, as I'm sure it'd be easier to lift up the top case slightly and then disconnect these two cables rather than fiddling through the tiny holes. I think going in that way give you a side angle and more opportunity to grip properly. And less opportunity to break your Powerbook. Anyhoo...
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Jun 28, 2007
About a week ago I received my new battery due to the recall. The last few days my power book has been great when I open my power book today it will not wake up. So i figured I would plug it in. The light stays green, does not change to orange, and still continues not to wake up. Even taking the battery out and trying to turn it doesn't work. Power cord stays green then as well.
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Sep 7, 2007
I have a 1.67 GHz Powerbook G4. This morning it was fine. When I got home from work, it decided that it suddenly no longer wants to stay on when not plugged in. The battery is showing a full charge. The light on the plug is green. But the second I unplug the cord from the laptop, the entire thing shuts down.
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Apr 15, 2008
I received an old powerbook from a friend today and i plugged it all in and everything and the power adapter in the back and the ring lit up orange but when i went to turn it on nothing happened at all i didnt hear anything inside, it just didnt turn on. i really want to find the problem and/or fix it up.... I dont want to part with it as i need an extra laptop...
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Jan 21, 2009
I went to turn on my Powerbook G4 (Aluminum 1.67GHz Low Res) today and when I plugged it in, I noticied a kind of crackling or popping noise. I unplugged the power adapter and tried again. I knew that my battery was dying before this (could only get about 30 min on a charge). But now I cannot start my Powerbook. Whenever I plug in my power adaptor, there is no green/orange light. However, when I take the battery out, I hear the Powerbook trying to start up (hard drive spin). But then there is nothing but my fans on full blast! They will not stop and there is nothing on the screen. I left it there for a good 5 min and nothing changed!
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Mar 8, 2007
I just aquired a PowerBook G4 (500Mhz) and it is dead. It will not turn on no matter what I try and when I plug in the power adaptor it glows a bright orange (almost red)...what does that mean?
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Nov 22, 2009
so this is the issue. I've always used istat menus to monitor my computer usage i.e. RAM, CPU, Fans, power, etc. With my old 2008 Mac Pro istat used to display how much power it was using however with my 2009 Mac Pro it doesn't. It displays 0 Watts throughout. Any ideas on how to solve this. I'm really curious with regard to how much power this system uses.
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Apr 13, 2012
Vertical lines are displayed consistently on desktop and software apps. How do you remove them?
Info:
iMac, Mac OS X (10.5.8)
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Apr 29, 2007
I've just switched from an iBook to a MB. My iBook always displayed 4 bars of wifi here at home (my wireless router is in the same room). But my MacBook often displays only 3 bars in the same room. What could be causing this?
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Nov 15, 2006
I am leaving for a week long trip and many parts of it will not be able to run the computer off of the powercord, which is a problem because I get about 40mins of wordprocessing use out of it when I run the battery alone. Can someone explain what the significance of these levels are for my Powerbook G4 15'' (Alm) 1.25GHz, namely the cycle count and full charge/remaining capacity?
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Oct 20, 2007
My iBook G4 is out of warranty and the backlight goes out. Sometimes its seconds, sometimes minutes, sometimes days. Its really annoying because besides that, the computer works perfectly. I want to take it apart and see if theres anything I can do to it (is there?) I know its risky, but I am willing to do it, so don't tell me anything about the risk involved. I would just like to know if its possible (thinking it might be a loose wire or something?) and if it is possible, does anyone have any tips or point me to a good tutorial on how to do this? I just really want to get this fixed, especially with Leopard 6 days and 6 hours away (and 45 minutes and 30 seconds).
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