My 2000 G4 PowerMac tower will not power up. I do hear a high pitch whine

I try to start it up and nothing happens. I do hear a high pitch whine, like something is running. What would the problem be? Hopefully my HD is ok.

Hello,
Could be many things, we should start with this...
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at the top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair. Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)

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Situation: Brother got tired of his powermac G4(400MHz), so he gave it to me. He had issues with starting it up, basically it would not turn on.
So I went to work on it trying to figure out the problem. I cleaned out the inside with my compressor at a very low pressure to keep from damaging the hardware. It powered up after, but I had to reinstall the OS, I only have OS 10.3, then I upgraded it to 10.3.9, which requires a lot of restarts. I tested everything; hard drive worked fine, internet connection fine, watched a dvd, burned a dvd (only to test it).
I was using my dad's monitor since I didn't have one. So I shut it down, unplugged everything, went to sleep, and the next morning it didn't turn on..
I've tried everything I could; tested the power cord, reset using the CUBA button, plugged it directly into the power socket. It still does not want to power up, what do I do?

So, you used the Power Mac G4 (Gigabit Ethernet): Power Supply Voltage Test as your guide?
You can find new power supplies at the following:
MacResource
HardcoreMacs
We Love Macs
Check with LEM Swap
Aftermarket PSU from Nextro (most economical new PSU)
Or, check eBay or Craig's List.

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Hi all,
My computer just croaked on me.
It was running fine then suddenly shut down. Now when I press the power button the power light turns on then off, there is a clicking sound, the internal fan starts to turn then stops. All this takes less than a second.
I've unplugged everything but the power cord, reset the PMU switch, let it sit for a while, held the power button down for a minute. Nothing's worked.
I did notice that there was a red LED that came on when I pressed the power button. It is located on the forward edge of the board just below the upper set of DIMMs. It came on every time I pressed the power button then went off again like everthing else. But it hasn't come back on since I reset the PMU. I have no idea what this means.
Any help is greatly appreciated.
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Lighting does strike twice. We had another G5 (dual 2.3 GHz, May 2005) acting strange yesterday (Quicktime movie freezing up, cannot shut down/restart via Apple Remote Desktop), so we went to the comm closet to check it (another pampered G5 in a cooled, dust free environment).
This one's leak is a bit different – slow enough that the coolant has been crystallizing and drying very quickly, over a longer period of time. Think we've caught it before anything has fried...just heating up enough to cause a "kernel[0]: Graphics chip error! Restarted" in the system.log.
Apple should have issued an official recall on these. This is crazy. =\
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It shut itself down and will not power up. Battery was charged

I have (had) a brand new late2013 13" MacBook Pro that my wife and I really splurged on. It had the 512 gb (over 500, I know that) SSD hard drive, improved processor, and chose to stick with 8 gb of ram. In other words, we dropped close to $2000 on that notebook.
Within a week, it started doing what you are explaining. In fact, during one of the forced shutdowns, I was prompted to send an error message to apple. My wife wanted nothing to do with it, but I chose to anyway. Thankfully I did. When I couldn't take the frustrating shutdowns anymore I took it to the apple store.
AWESOME PEOPLE!!!! Granted I have been a PC guy my whole life. That started to change with my first really thick iPod in 2002. Slowly, the iPad and Apple TV made appearances in my house. My wife (an artist) then came in the picture and I am now and have been an apple guy, w/o the window sticker of course. My interaction with the apple store workers only increased my stoke.
SEND ERROR MESSAGES TO APPLE IF PROMPTED TO DO SO.
As I said, I went against wife and sent one to apple. The apple tech was able to figure out what was wrong immediately considering a copy was kept on my MBP, and because it was day 30 (really was) since purchase, he switched out with BRAND NEW UNIT! No refurb, no hassle!
All was fine until it did it again. Basically, if my computer sat on but was idle, it would go to sleep as we had instructed it to do in the energy savings preference page. Normally, to reawaken MBP, all we needed to do was tap space bar.
Like the first one we traded in, no luck. We would actually have to try and power up with power button, and even the apple techs found it frustrating as we had. Thankfully it did it in front of them as well.
Now is the kicker. Our contact felt incredibly bad, along with store manager, that this was now the third visit we have had to make involving a brand new computer. The manager wanted to make it up to us. I feel like her solution went so far beyond my expectations, I will never own another brand again.
She took all of our merchandise we bought for the 13" MBP, (bag, 12 south vertical stand, etc) and let us pick what ever replacements we wanted for the 15" MBP she was giving us. YEP, A 15"!
due to the fact that we specifically purchased the larger SSD in the 13", the entry level 15" did not offer the larger SSD drive. That saint of a manager moved us into the quad core, I7 with 16gb of ram!!! The only stipulation is that we pay for the apple care. When I thought it was truly over, she had one last surprise and charged only the difference between the apple care prices.
Good things happen to everyone else, always. Happy to report I finally had my turn.
I am not saying you will make out as well as I did, but if it is shutting down, especially in the first 30 days of ownership, send every report to apple it asks you to (for ease of retrieval by Mac employee) and trust they will do right by you. New computers should not shutoff for no reason, and the great thing is, they agree!
Considering my initial purchase for my 13" MBP came to around (off my head $1850 with apple care).
I now own the very high end $2599.00 15" because the SSD hd was comparable to mine.
I can't stress this part enough. I NEVER ONCE RAISED MY VOICE! I was a little upset but never complained once. I was completely understanding and never asked for anything above getting the first computer I paid for to work properly.
THANK YOU APPLE!!!!!THANK YOU APPLE!!!!! THANK YOU APPLE!!!!!
Bring your faulty computer in, send all error messages to apple, and most importantly remember that the young 22yr old standing in front of you there didn't build it. It's not his fault. Work with him with respect and apples philosophy will shine brightly.
FWIW, all of the service techs I spoke with at the Genius Bar are very aware of this situation and all feel an update is headed down the pipeline soon.
Good luck all!

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Same here. If I start up with the power adapter attached, it starts up fine. If I try to start up from battery only, the fan comes on, the sleep light comes on but nothing else happens. I tried letting it sit that way for about 15 minutes and nothing changed. I tried attaching the power cord while in this mode and nothing changed. I tried the PMU reset a couple of times but nothing helps.
This computer is just over 1 year old and I have not had any problems with the power cord (3rd party), the battery, or any problem like this before. It started after a proper shutdown last night and attempt to start without the power cord this afternoon.
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Hello, I need some help.
I have a HP DM3-1130us Laptop that will not power on at all.
the only thing that happens when I plug it in is the power jack lights up.
When the power button is used absolutely nothing happens.
No power, no fans, no leds, no on/off cycles, no beebs, absolutely nothing
just the light by the power jack that says the cord is plugged in.
The laptop has Windows 7, 320gb hdd, 4gb ram.
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I have taken the battery out and tried and nothing.
I've tried the option where you take the battery out and hold the power and nothing.
I have tried with different hard drive and no hard drive and nothing.
I have tried reseating the ram and tried new ram modules still nothing.
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Its not under warranty anymore so cant send it off.
It has not been exposed to any elements(extreme heat or water).
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If feels fine, its not loose or anything but could it
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the power button is on the side and is a kind of drag and release button.
Its also on the same board with the Wifi button and 2 Usb ports.
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Hey Tyler,
Unfortunately it is difficult to troubleshoot this type of issue. The majority of the time when the computer wont power on with the same symptoms you described, the power supply board is faulty. Most of the time if the motherboard is bad it should at least turn on or so some signs of life. Like I said, this is most of the time. Sometimes it could do exactly what your experiencing. I would suspect the power supply board has failed since you are not receiving any sort of lights, sounds, etc.
You could check the motherboard for swollen capacitors or loose solder joints but sometimes you wont be able to find anything.
I hope this helps answers your questions,
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-------------How do I give Kudos? | How do I mark a post as Solved? --------------------------------------------------------

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This question was solved.
View Solution.

Well, I've had the problem for a while and was just looking around to see if anyone has had any success stories.
I will tell you how I get mine up and running, but first some background. I was gifted this computer DOA and asked to retrieve data which I was able to do but in monkeying around, I discovered a "fix".
You see, I live in an area where we occassionally lose power for a day or two or three so the weakened battery never outlasts the outage. That's when the unit becomes unstartable.
Now the fix:
It is a variation of all the other suggestions about undoing the power cord and disconnecting the battery but here's the twist: After removing the battery and power cord, wrap your laptop in one then another plastic shopping bag and place it in the freezer for about an hour or two. Now, when you take out your shivering laptop, plug in the power cord and fire her up. It has nearly always started for me after this trial by cold but once or twice it needed more chillin'. Once it is started, insert the battery. I've never had any issues with this sequence.
You will have a lot of condensate on the screen but gently wipe it up with an absorbent cloth and let the rest of air dry as you let it run.
As long as I leave the computer plugged in and not reliant on the battery, it has never died on me.
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My 2000 G4 PowerMac tower will not power up. I do hear a high pitch whine

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