PowerPC :: Where Is The Hall Effect Sensor On The 15 Powerbook G4 1.67 Ghz?
Jul 2, 2009
I've been having problems with my computer sleeping when the computer closes. Basically i've narrowed it down to the hall effect sensor but no one has that part for my computer! ifixit and powerbook medic only have it for the 12". and it's not like the 15" is just out of stock, it doesn't seem to exist.
So is the thing that senses that the laptop is closed and puts the mac to sleep something else on the powerbook? I've searched for reed switches and hall effect sensors.
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Feb 28, 2008
Is there a moisture sensor on the Powerbook G4? I got mine soaked and it wont work (Kernal Errors and beyond).
I just opened it up, and didn't notice anything, but I didn't remove the logic board.
If there's not, maybe I can just play dumb and get it repaired?
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Oct 12, 2007
I was wondering how/where the sensor is/works to tell the computer to go to sleep when the lid is closed. I am doing some mods (discussed in the marketplace forum) and would like to try to keep that sensor intact if at all possible, but i realized I have no idea where it is located or how it senses that the lid is closed on these.
I searched the forum a bit and found nothing, and can't find anything in google other then sleeping problems... unless I just am horrible at googlin.
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Nov 11, 2008
I think this post would fit in the Hardware/Notebook-section as well but since I am looking for a OSX workaround, I will post it here:
I have a problem with the sudden motion function in my PowerBook. When switched on, the SMS causes to switch off the internal hard-drive at random, even if the Laptop stands on a perfectly still and flat surface. This results in interruptions that make it impossible to work with the computer.
I already had this problem when I was running Panther (10.3.9), and deactivated the SMS with the "pmset"-command using the Terminal at the time. As long as I was running Panther, this workaround worked perfectly for me, I had no more hard-drive-interruptions.
Later, however, I made the Upgrade to Leopard (I skipped Tiger), making a clean install after formatting the PowerBooks hard-drive. Now the SMS was active again (and displayed "active" in the System Profiler) and the HD-interruptions were back.
So I tried to deactivate the SMS with the "pmset"-command - this time without result. I can set the value of "sms" to 0 and back to 1 all right - the Terminal shows the corresponding value when prompting "pmset -g".
Unfortunately this has no effect to either the hardware (the interruptions are still there) or the System Profiler (is displays "active" for the sms, regardless of the value that is shown when using "pmset -g"). I am aware that the variable was altered from "ams" to "sms" from Panther to Tiger (and subsequently Leopard), but neither "pmset -a ams 0" nor "pmset -a sms 0" would work.
To exclude the possibility of a real hard-drive-malfunction, I bootet the Powerbook from an external Firewire-Drive an with my an Panther-backup. After making some testing with accessing the internal HD (it worked fine), I looked into Panther's System Profiler and saw that the SMS was deactivated as expected.
I then experienced something strange - when rebooting Leopard, the sms-Status in the Profiler still was "inactive" and the PowerBook worked perfectly again. I was quite happy and made some updates. However, somehow the status was set to "active" again after some reboots, along with the malfunctions experienced before.
I wanted to find out, whether this "reactivation" had something to do with one of the updates (I brought the system up to 10.5.5 at the time) and booted the old Panther again. The sms was inactive again, again remainded inactive after reboot with Leopard.
I tried to reboot with and without power plug, I even made a PMU reset - the SMS remained inactive (which was good and made me hopeful again). However, after I switched of the Notebook and bootet again a few hours later, the sms-Setting in the Profiler was "active" and the Notebook was again not working properly.
Is there any possibility to access the sms-setting apart from "pmset" in the Terminal? Where does the system profiler derive the status from?
I want to deactivate the sms for good and at the moment this apparently works only in Panther (and I really don't want to downgrade to 10.3 again). I don't want to have it repaired since I think this would mean to replace the Logic Board which is a much too expensive investment for a 4.5-year-old Notebook.
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Dec 6, 2008
[URL] I went here. I have found out the iMac is a 2nd gen iMac G5. It has an ambient light sensor. I put my hand over it and it doesn't appear to actually do anything.
What is it supposed to do?
Do new ones have it? I have a 20" aluminum one as well, but don't see a sensor.
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Jul 9, 2010
I could just by the replacement fan and swap it out but I am wondering if there is anything else that could be malfunctioning and causing the fan to NOT spin up - anything I can check before forking out the cash.Is there a way to see if the temp sensor is working? Could it be the LB? Can I test the electrical supply to the fan by using a multimeter? If so what setting/voltage, etc should I use to read that? And lastly, is there more than one fan?
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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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Sep 12, 2010
it is almost like a negative effect, but not the actual negative effect that you can do by pressing "ctl+alt+com+8". The other odd thing is that is has seemed to get a little better in the past day or two on its own. I have attached a picture (the problem is best seen in the upper left portion of the display although this problem does cover the entire screen). Does anyone know if this is a fixable problem?
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Jul 29, 2008
I have a severely dented 15' G4 that has suddenly developed an all-over screen flicker together with an bleached effect that sometimes makes it impossible to read. The screen itself has for a year or two now been held together with brackets of folded sheet-brass (they clamp like giant binder clips), because both side supports have broken near the hinge. (I've attached a photo of the brackets and the bleached screen, as well as a photo of one of the damaged side supports.) This new surprise is probably due to the laptop's having recently been transported in the same bag as a leaky water bottle. I turned the computer off and let it dry out overnight as soon as the screen started flickering, but I appear to be left with a permanent bleached screen (can't see yellows at all, black appears as light gray) and occasionally (thankfully temporarily) a super-bleached effect where only very thick black writing is legible. I am certain that this is my fault (either from dropping it too many times or from water damage or a combination of the two) but I'm wondering what exactly my options are for possible solutions. Replacing the LCD would be expensive, but a new computer even more so.
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Nov 5, 2009
Where do you sit on the whole Genie Effect vs Scale Effect war that's been raging for the last 8 years? Whilst the Genie wowed me the first time I saw it, I chose Scale Effect pretty much as soon as I got OSX, preferring performance over prettiness. Now, years later, when I occasionally catch it on other peeps machines I think it just looks... tacky. I wonder how many people on here still have it switched on?
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Oct 15, 2008
My 12 inch powerbook does not start up. Instead it loads to Darwin. I have an install disk from a 15 inch powerbook G4 and I would like to know if using this would work on my 12 inch powerbook G4?
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Nov 22, 2006
I have a Powerbook G4 1.5 w/ 1GB of RAM and the stock 80GB HD. I've run this puppy pretty hard for a couple of years now, and it's lately started to lag a bit - perfectly natural. I was considering buying a new notebook but I've decided to wait until after Leopard comes. So my question is:
1) How do I determine the max RAM I can put in this machine?
2) Are there are specific specs I need to be concerned with when swapping out the Hard Drive? Any type, size limitations, speed limitations, etc.
I'd love a little input as to how I find out this info. I think instead of taking the notebook plunge now, I'm going to put a nice new hard drive in this one and possibly bump up the RAM a little more if it will take it.
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Mar 14, 2007
So is the is Powerbook G4 802.11g or b? it is the 1.25GHz model. Also, one thing I don't understand regarding the airport extreme or any airport for that matter: isn't the maximum speed going to be completely determined by how much the cable provider, Comcast, pumps out?
If this is the case, how do I determine what my transfers and speeds are looking like specifically for Comcast? And, how would an airport extreme improve upon this or any other performance aspect in this regard?
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Jul 18, 2007
Powerbook G4 (Ti-book) 667 mhz, 512 mb RAM. I finally after YEARS upgraded my OS (10.4.10), yay me! Just bought Adobe CS3 (for the new IMAC we have yet to buy), but I would like to install it on my Powerbook. SO, it it time to bump up to 1GB RAM. I was told it was tricky, and I should take it in to the apple store to install, but then I took a look under the keyboard, and it looks pretty simple. i have installed new RAM on a G5 tower, and this looks way easier. So, I am planning on buying the RAM either online or at FRY's, then installing it. BUT, I know I have to be careful of what type of RAM to buy. I found what I think will be good at [URL] but I will have to buy 2 (512's) as mine currently has 2 (256). I guess I just want to make sure I am not going about this the wrong way before I drop about $200 for RAM upgrade...
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Sep 27, 2007
I have a 15' Powerbook G4 1.67, currently with 512 of ram....so i'm shopping for an upgrade, but not sure which specific type to go with. In my system profile it says i'm running..
Type: DDR SDRAM
Speed: PC2700U-25330
And these are the types i've been seeing to choose from.
G4 15-inch 1.67GHz (DDR M9676LL/A) Memory
G4 15-inch 1.67GHz (DDR M9677LL/A) Memory
G4 15-inch 1.67GHz Double Layer DDR2 (M9969LL/A) Memory
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Sep 3, 2008
I just bought a used 12" powerbook G4 1.5ghz and I want to add some ram to max it at 1.25Gb. Did anyone try to use ddr400 instead of ddr333 on powerbooks? In theory it will run at 333 like in any pc, but is this flawless in powerbooks? Because ddr333 is expensive nowadays.
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Sep 6, 2008
I know the powerbook is rather archaic now, but I'm trying to get a new Macbook and don't want to throw my old powerbook away. So.. I have a friend who wants to buy my old G4 Powerbook with 60GB capacity, 512 MB memory, 1.33 GHz cpu speed. It's extremely worn in, meaning, it won't last more than 20 minutes off the power cord, but someone could always replace that. So what would be a fair price to charge someone to take it off my hands?
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Jul 22, 2009
I bought a powerbook G4. The ram is 512 mb but i want to upgrade that. Is it possible to place two 1gb cards in each slot. That i have a total of 2gb ram? Me was told that the max of the powerbook G4 is 1 gb. Is that true? And when it is true, is it smart to buy a total of 1gb for the powerbook g4? Or doesn't make that any difference?
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Aug 9, 2009
I believe the hdd is dead so I need to find a replacement but I've no idea which cause there are 93487534231 kinds. Only thing I can really find via googling is that it has to be a 2.5" ATA but there are several different kinds of ATA hdds... so confusing. I was thinking this? [URL]
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Aug 26, 2010
Just replaced the logicboard on a 01' Powerbook G4 Titanium Onyx and I'm getting the no video/beeping sound after the chimes upon power up.
3 beeps
3 lights (1 long + 3 quick flashes)
I don't THINK it's the RAM though, I thought these cards were good before the computer fried. I've swapped the two 256MB cards with each other, also plugged just one RAM card in both slots one at a time--still no turn on and I get the 3 beeps. Unfortunately I don't have any extra 144-pin 133 Mhz SDRAM chips laying around or i'd just test them. It seems unlikely that both RAM cards would be broken, in addition to the logicboard frying, unless the two events happened simultaneously. Previous install had the 667 Mhz upgraded processor and when I took the logic board out it was fried on the bottom with lots of corrosion/leakage on a good 5% of the surface area. Anyways, I replaced it with a 550 Mhz board. Could the beeping be from installing the different processor or is it more likely that I simultaneously fried both RAM chips plus the motherboard?
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Nov 27, 2010
Do you guys think it would be worth it to spend the $50 to upgrade from 1.5GB ram to 2 GB ram in this machine with Tiger on it?
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Jul 31, 2006
I am kind of new to the MAC world... I once had the really old ibook with the handle a long time ago..and I never got a new Mac due to some problems I faced!
But now, I want to go back to MAC because many things were developed and I missed using a Mac! So, now I am confused between the Powerbook12 inch or the White Macbook 2Ghz ? I really love the size of the Macbook but I am worried about the intel processor...?
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Sep 7, 2006
This is ridiculous. After I went out and got a new screwdriver to install my 1GB stick of RAM, which I got off of Newegg, it is now not recognized by my computer. So now I'm running with 256MBs of RAM. Beautiful, thank you Apple.
[URL]
This is what I ordered...Crucial Technology 1GB 200-Pin DDR SO-DIMM DDR 333 (PC 2700) Notebook Memory - OEM
I thoroughly made sure this was the right RAM, and even people with my same type of computer have said it works on their posting thing.. 1.5 GHz PowerBook G4 15". Anyone know how I can get this to work?
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Sep 13, 2006
My PowerBook 12" 1.5G has 100% CPU usage when playing back the new TV program from iTunes store. And sometimes it even choke.
While I have no virus scanning software, some programs running such as Opera, iTunes, Entourage and have about 20% CPU usage when idle.
Why is it so slow on a PowerBook while you can actually play that video on an iPod? Is it the iPod too powerful or it is just because apple did not optimize enough for older Macs (pushing people to new hardware)?
I have just ordered a new iMac but I am not happy about my PowerBook which is just one year old.
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Oct 3, 2006
I have an older 15" G4 Powerbook (before the recalled Powerbooks with the RAM slot failures) that has recently been experiencing some speed issues. To my dismay, when I checked my 'About This Mac...' I no longer had 1GB of RAM, only a lowly 512 MB. Tonight I sat down and started swapping and removing my two sticks of RAM and as it turns out, something is up.
With a 512 stick in the lower slot, System Profiler tells me I have 512 MB of RAM and that the upper slot is empty. When I put the other stick in the upper slot (leaving the lower one in), System Profiler now says I have 512 MB of RAM and that the lower slot is empty. Does this look to be a (out of warranty) logic board failure? Is there anything else I can try to do? On a related note, when removing the screws from the RAM panel on the bottom of my PB, one screw fell into my Powerbook, never to be seen again. Is this going to cause any problems down the line?
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Oct 6, 2006
I think my backlight went out?
I restarted and nothing. Still dim. I can barely, barely see things like if I hit expose, I can see shifting rectangles.
Also, I've been having this issue where the keyboard mostly stopped working -- if I hit kjjh, it'll come up as 3443 or something. It's usually fixed with a restart.
I have it covered by a year of applecare until feb 24, 2007 -- but I haven't registered it yet. Should I register and then call apple or what?
This comes at a REALLY bad time. I have design projects coming up everywhere and of course, despite my $250 external hard drive, i haven't been backing things up because I'm an idiot.
Can I hook it up to a external monitor just to make a backup of my hard drive?
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Oct 8, 2006
Is it possible to get 2 gigs of RAM into a Powerbook (12") or is it stuck at 1.25 gigs?
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Oct 19, 2006
My Friend has a 15" Powerbook (2nd last rev.... 1.67ghz with lo-res screen) and it's been on the fritz lately. It operates completely normal and then it suddenly goes to sleep. When I wake it up it's back to normal just fine. It goes to sleep after about 3 minutes of use.
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Oct 19, 2006
I recently replaced my 12" PowerBook G4's 60 gig HDD (due to failure) with a 80 gig HDD (TOSHIBA MK8026GAX).
I'm now running out of space and am looking to upgrade to a 100-120 gig HDD (and put my existing TOSHIBA MK8026GAX HDD in an external FireWire caddy).
After research, my two options are: 1 - TOSHIBA MK1234GAX, 2 - TOSHIBA MK1032GAX. Both offer good performance in my price range.
Option 1 is a 120 gig HDD with a 8MB buffer. Option 2 is a 100 gig HDD with a 16 MB buffer.
Obviously I would like as much space as possible with the best performance. Would I see a large drop in performance going from a 16 MB buffer to an 8MB??
All the drives have similar specs (seek times, etc), besides the buffer being smaller on the 120 gig HDD.
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Oct 19, 2006
Do I spend my money on a 120 gig HDD with a 8MB buffer, or a 100 gig HDD with a 16MB buffer??
Check this thread out for more info [URL]
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