PowerPC :: When The Machine Is Powered On, There Are A Few Seconds Of Static?
Jan 6, 2009
I have a G5 / no iSight iMac. There is rumor that a power surge occured. When the machine is powered on, there are a few seconds of static, sounds a bit like pink noise, coming out of the internal speakers. After that, it will boot properly, and there's an occasional static sound. If there is no RAM in the machine, it obviously won't boot, but there is no static at all. Just that "tone" signaling the absence of RAM. Any ideas?
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Apr 30, 2010
I am looking at some OWC external drives to use with time machine on my new iMac. Is it better to go with a bus powered drive or one that has it's own power supply? I like the idea of only having one cable back there to keep with the clean look of the iMac but will go with an AC adapter if need be. Also I have a 1 TB hdd and only using a fraction of it right now. Do I need to go with a 1 TB ext hdd or can I save money with something smaller? Thanks.
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Oct 28, 2006
I recently have been having start up problems, when I would hit the power button I would sometimes hear a healthy startup and everything would boot up and then I just get a black screen and you can still tell it has power. I would start and restart untill it would boot. Now the only way the machine will start is if I unplug the moniter cord and plug it back in then it will start.
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Feb 3, 2009
I have an snow iBook G3 that I use everyday as my machine for doing schoolwork etc., so it is a very critical machine. The battery doesn't hold a charge anymore, so I just plug it in. No big deal. However, just a few hours ago the iBook started to not recognize it was plugged in. The prong has always been bent a bit, I think, and it always worked (before MagSafe type). The charger is beat up at the cord going into the power brick from the wall outlet, but it has always worked too and it seems to be a problem with the prong going into the computer. I have to hold it a very certain way for it to even detect power. So, the machine has NO way to get any power. I was thinking about taking it in to the Apple store to see if they could still get me a non-magsafe charger, but what if its something different then the charger?
The specs are as follows:
12 inch iBook
PowerPC G3
500 mhz
128 gb RAM
I have a Vista laptop I can use until its fixed, but I'd rather not use Windows. No speical prgrams or anything, I just really like Mac OSX. I have files on the iBook, too.
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Feb 26, 2009
I have a 15" PowerBook G4 1.33 Ghz and I discovered that the provided USB ports do not power such devices as portable hard drives or audio interfaces.
So I heard that you need a POWERED USB hub.
I get one, Plug it in. And the PowerBook still doesn't recognize my external hard drive.
My hard drive has two wires on the opposite side from the enclosure that connect to female USB ports. I run an extension cord from one of the males to the other USB port on the PowerBook which is said to work but that also does nothing.
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Aug 31, 2010
I have an old PowerBook G4 that my son uses for simple stuff. One day the screen went dark gray (not powered off) and it won't boot. When I try to boot from a Tiger disk, I get what appears to be a kernel panic. I don't get any strange startup beeps
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Mar 21, 2009
I was thinking that if i bought an external MOBILE hard drive (un-powered) i could take it with me sometimes when i need it in UNI (in Lectures where there is no power source to plug drive in), but also attach it to the mac and since it is un-powered and mobile time machine will work without needing external power.
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Jul 16, 2010
My first time swapping an internal computer component btw. And I'm planning to install my new momentus xt in it. I have read online on how to effectively ground myself, using anti static wrist bands, etc. But they all point to building a desktop computer. Is there a piece of metal where the wrist band wires can attach to in the macbook pro? Would doing the procedure on cardboard or floor tiles work?
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Dec 10, 2006
My Powerbook has been making a static-y sound from the back of it at random times. It sometimes won't do it all day, and then it will randomly start, and won't go away for a while. It's actually doing it right now! I've tried putting it to sleep for a few minutes, but it started back up again when i woke it up. There, it just stopped again! It can last from a few minutes to an hour, completely randomly! This problem started when I had Apple replace the logic board on the Powerbook a few months back, and numerous repairs later, nothing has changed, so I'm hoping someone here has an easy fix!
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Jul 8, 2008
My mac has worked great for the last 2 years since ive owned it and it just started to act a lil differently about 2 weeks ago. I started to notice that it started to act a lil slower than normal when i was surfing the internet. Then a couple of days ago the computer started making like a buzzing noise , kinda sounds like interference . Like when a cell phone gets close to a stereo system. Sometimes the noise will go away and then when i start opening diff app. that use computer cpu the noise happens again. It was just making the noise and i was dealing with it until the computer started to crash. It would look like the screen was on fire and everything would just freeze. Do you guys think it is the hardrive ?????? and if it was what would be my best option for fixing this. Can i save the stuff that is on my current drive ?? I have a bunch of stuff that is very important on this hardrive.
whats the best place to buy a hardrive if i need one ? and can i buy a hardrive that can hold more than the stock 74.53 toshiba MK8025GAS ?
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Jan 25, 2007
My roomate as a powerbook g4 1.5ghz, it had been running 10.4.8. The computer will go into sleep mode randomly about every 10-15 seconds. Doesn't matter what program he's using. If he leaves the comp off for a few hours, it wont do it for a while and he can use it. Only thing we've found online is that people had that problem when they had faulty trackpads/trackpad sensors. But we don't think that is the issue we weren't getting an error message as they were in the console when it would occur. We called a local mac shop and they said it'd be 100 bucks to diagnose the problem, and probably it sounded like he would need a new logic board for another 700 + Labour.
A friend at school had the Apple Service Diagnostics 2.5.8 boot disk. He told us to give it a shot rather than paying the 100 bucks to get it "checked out" as it would most likely tell us what, if anything was wrong. We ran it, all hardware and software tests passed w/o any errors. We even tried doing a full format and reinstall of OS X 10.4.1, it got through the install procedure, and it seemed to be working ok for about 30 minutes, then suddenly the problem started again! So I that makes me think its not software related. So far two software "tests" and one full ASD hardware test got us nowhere. He's tried a lot of stuff he found online, but nothing has worked. Such as resetting all the various rams and sensors and PMU.
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Mar 30, 2012
Two days ago, I pluged in a Maxor hard drive that loaded some softwear onto my computer. I reformatted the drive because it did not work. Shortly after this I started reciving this message:
"You can't open the application NotificationExec because Power PC applications are no longer supported."
I cannot type for more than seconds before any program kicks my out to the message again. It has taken 15 minutes just to type this post.
Info:
MacBook Pro
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Jun 26, 2008
Got a 4 year old 15" PowerBook with a small history of battery issues. Its on its 3rd battery that is on its last leg. It can't be unplugged for more than 5 seconds or it shuts off...been this way for months. Well today it shut off and won't turn back on. Do I buy yet another battery or is my pb dead?
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Sep 20, 2008
I have a 17" G4 1Ghz iMac, we used it until 10 months ago when I got my new 24" Intel 2GHz machine. That new 24" iMac is now in the basement craftroom as the digital hub for pictures/video/etc., while I brought the 17" G4 1Ghz iMac out from my closet for the upstairs loft general web surfing machine. It worked for 2 days and upon shut down would not re-start. I could only hear the fan and nothing else. If I held the power button for 10 seconds upon trying to start up there was a chime that sounded for a few seconds. Once the fan is making small sound, nothing else, if I hold power button for 5-20 seconds the computer will shut down (fan turn off).
Did some online checking, found article on PMU, so I did try and re-set PMU via the apple support article.Resetting the iMac (Flat Panel) Power Management Unit (PMU). Still, no re-start. It was running the latest 10.4.x update upon being put away for 10 months. Here is a picture of the bottom, the red light is on upon trying power on, my finger is on the PMU reset button. Is there any other diagnostic thing I can do? Is there a battery on this logic board that I can check/replace? I'm 100% ok at taking it apart and trying anything to fix it.
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Mar 25, 2009
The other day the screen started blinking randomly. It'll flicker for a few seconds and then go white with vertical grey lines for a few seconds. Then it will go back to normal. There doesn't seem to be a pattern to it. Sometimes it will go through that process for five minutes and then stop. Other times I can be working on it for hours and nothing will blink or act screwed up.
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Jul 21, 2009
I have a G5 dual 1.8 power PC...Bought some ram put it in & booted up. Then a red light came on the logic board behind the power button. The machine wouldn't turn on....I called apple care & we rearranged the ram, now the red light is gone but my system still won't boot up. The white power light blinks every few seconds... the apple store told me sorry can't help because your machine is vintage. Even if my logic board is fried is there a place to buy one on the cheap?
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Jun 29, 2012
I am using a Mac Mini with a Realtek USB wireless dongle to connect to the internet. The software and drivers appear connected perfectly and i see the wireless utility and I can access my wireless network, which says signal strength 100%. I connect to it and it accepts the wireless key. Says connected. Then after a few seconds the connection is lost and it says 'Disconnected'. A few seconds later it connects then disconnects and this continues indefinitely but Safari never allows me to access any webpages.
Info:
Mac mini, Mac OS X (10.5.6), USB Wireless Dongle
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Jan 10, 2011
I love my iMac but the one thing I hate is that it only has 4 USB ports...
I have 3 USB 2.0 External Drives.... My digital camera, iPhone, iPad, Kodak Zi8, Elgato Eye, and Harmon/Kardon Sound Sticks... and a few other USB devices...
Can anyone suggest a good Powered USB hub? I have this little 4 port laptop USB hub.. right now, but my external keep disconnecting..
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Nov 10, 2009
Imac, osx Leopard. Was working fine for many months (except for the 27 vertical lines but won't bore you with that), I bought a powered usb2 hub to power a usb hard-drive, when connecting the hub after a few minutes the Internet connection stopped and does so any time I connect the hub, now without the hub being connected the internet stops and starts every few minutes making it impossible to do any work. Other macs in the house are unaffected (s I'm having to write this on a minimac). Has something damaged the imac for good ?
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Oct 2, 2008
Has anyone here have any success using an external USB drive (2.5 or 1.8 small drives) thru a hub with the Air?
I know I could use a powered hub but I hate taking and messing about with additional power supplies when I travel.
does anyone know of a specific model HD that works with out needing to connect directly to the one USB port but thru the hub?
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Dec 21, 2008
I occasionally have trouble charging my iPhone via my iMac USB ports. I plug in the iPhone, the screen indicators change to show that the phone is charging (green battery indicator and the lightning bolt symbol). However, when I come back to the phone several hours later, the charge indicator hasn't advanced any. For example, if the indicator showed half-full when I plugged it in, it remains half-full.
The iMac does go to sleep a few minutes after I leave it, but sleep has never precluded an iPhone battery charge on my MacBook, and most of the time it works on the iMac.
Is there anything, besides shutting down a computer, that causes a USB port to unpower while the iMac is sleeping? Does it matter whether I am logged in or simply at the login screen?
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Mar 20, 2009
I recently got a Macbook and have a iPhone and iPod shuffle. The thing is there isn't enough usb ports on the Macbook so I had to get a hub. The hub I got IS self powered and does not require a external power adapter. My concern is that I am withdrawing too much power from my usb port through this hub. It is a 4 port hub and a External HDD ( has own power supply), Optical mouse is connected to it. also I charge my iPhone and shuffle via the same hub.
I am afraid that there is power limit feature and it will fry my computer. I notice if I boot in boot camp to windows. Windows will display a error message telling me, I am not allowed to have this many device drawing this much power. Anyone know if I should be okay as long as OS X doesn't give me a message or should I really consider getting a USB hub with its own power adaptor?
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Jun 19, 2009
Is there no way around this? is the USB simply for power? IE can i just plug it into a powered USB hub (thats not actually plugged into the air?
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Oct 27, 2009
I share a quite common problem. My macbook doesnt boot-up.It does power on and gets into the booting up process but nothing happens...
To be more precise, after powering on the MB, the grey display appears and after a while the apple logo and the circle of lines starts to move around.
After that nothing else happens...
I ve tried everything possible... SMC reset, PRAM reset, verifying the disc by booting up either from single user and check it with fsck or with the booting disc and run all the verifying tests and the repair ones... Everything there were just as NORMAL...The OS refuses to open either in normal mode, or at safe mode or even the verbose mode, though it does boot up in single-user mode.
I even took out the HDD and place it in a HDD cover and then plug it as an external device to my other MBP. I run the tests once again but everything seems to be NORMAL again...The only thing that is left to check is whether the boot files have any problem...
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Jan 6, 2010
What is the most beautiful powered usb hub out there? I'm looking for a hub to go with my mac pro and I have a lot of devices that requires a powered usb connection.
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Dec 27, 2007
I am the original owner of a Power mac G5 dual 2.0 I purchased this machine in april of 2004 and it has been working nearly non stop ever since. Recently I put it into sleep mode and when I came back it had powered down and would not start up. I assume it's the power supply and I would like to know if there is anyway to tell what type of power supply and model thereof without tearing down the machine.
Information:
Powermac G5 Dual 2.0
Mac OS X (10.4.9)
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Dec 18, 2009
I had a powered USB hub attached to my computer, w/ a mouse and two printers attached to it. For a while, it seemed to work fine, but then the printers wouldn't work, and I had to connect them directly to the computer. I decided the problem must be with the hub, so I went out to MicroCenter and bought a new powered hub. Again, it seemed to work for a while, but then the printers again wouldn't work. There aren't enough USB ports to run all my peripherals so I have had to disconnect a backup USB hard disk. The hub is now disconnected entirely, and I have to switch connections around. Needless to say, this is a pain.
MacBook Pro 17" 2.33 GHz Intel Core 2 Duo, 4GB Ram, w/ external 22" ViewSonic monitor, running OS 10.5.8
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Feb 11, 2008
Will Apple's external Superdrive work through a powered USB hub?
Or does the Superdrive need to be plugged directly into the MBA?
Are there any other USB devices that will only work directly plugged in?
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Feb 18, 2008
I bought a Belkin powered USB hub and hooked my MacBook Air Superdrive to it and it won't work. I was under the impression it would in a powered USB HUB. Anyone share any experiences with me on this?
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Jun 2, 2008
What is the best portable HD that can be powered from the MBA's USB hub without a power cable.
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