G4 dual 1 gig.. no power, but the light flashes once?

Today I noticed that after I left the computer alone for a while it was shutdown.. I turned it back on and used it for a couple hours, stepped away for 40 minutes and it shut down again. I turned it on, and within 2 minutes the power cutout. Then it wouldn't turn on at all, I would push the power button on the front panel and the light would flash like it normally would when it was powering up, but no fan whirling and of course no power.
So.. after trying to reset the PMU, it turned on, I zapped the PRAM, and right as it was loading the desktop, it's died again. And now it won't come on, just flashes once when I try and turn it on (the power button light).
Is this a sure indicator of a dead or near death Power Supply?

Could be a bad battery. Have you ever changed it?
I would check it first. When mine went, I had no response from my Mac at all; just a light on my power button; absolutely no boot at all.
Check out things in Texas Mac Mans tutorial on the subject. His tutorial is a little dated (don't believe it even mentions G5's) but the info in it, except SMU not being included, still applies.
Cheers!
DALE

Similar Messages

Hello, My white McBook (2008 or 2009) recently stopped turning on. When I hook up the Magsafe power adapter, the light shows green, but the computer will not turn on, or make a sound. I've tried the re-boot option, but nothing works. Please advise!

Hello,
My white McBook (2008 or 2009) recently stopped turning on. When I hook up the Magsafe power adapter, the light shows green, but the computer will not turn on, or make a sound. I've tried the re-boot option, but nothing works. I first thought I needed a new battery because the lights at the back are all off, but shouldn't the computer turn on once the power adapter is hooked up and the light on the Magsafe adapter shows green? I'm a computer doofus, so please be kind. Please advise! Thanks in advance.
SS

Take it in for service.

HT1349 there is power, but the screen just went black

i have a mac pro that has power, but the screen went black. has anyone else had this problem?

Hello Gail,
It sounds like you can hear your Mac start up, but you do not see anything on the screen. I definitely understand your concern with this.
I found an article with steps to troubleshoot issues with displays. This article is for internal and external displays. I wasn't sure if you were using a Mac Pro or MacBook Pro from your post. If you are using a Mac Pro, follow the steps for external displays, but if you're using a MacBook Pro, follow the steps for internal displays. I recommend reviewing the full article, but this step specifically stands out to me for the issue you described:
Reset the system
You can reset the Mac's parameter RAM and SMC.
You can find the full article here:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Thank you for posting in the Apple Support Communities.
Best,
Sheila M.

I updated my Apple Tv and now the light flashes, but wont turn on

I updated my Apple Tv and now the light flashes, but wont turn on,I have unplugged and still will not work

Welcome to the Apple Community.
If your problem persists get yourself a micro USB cable (sold separately), you can restore your Apple TV from iTunes:
Remove ALL cables from Apple TV. (if you don't you will not see Apple TV in the iTunes Source list)
Connect the micro USB cable to the Apple TV and to your computer.
Reconnect the power cable (only for Apple TV 3)
Open iTunes.
Select your Apple TV in the Source list, and then click Restore.

I have a 60 inch Sony XBR TV that has DVI input but not HDMI. I am using an adapter to get the video from my Apple TV, but the screen flashes a lot. Do I have any other choices other than buying a new TV?

I have a 60 inch Sony XBR TV that has DVI input but not HDMI. I am using an adapter to get the video from my Apple TV to the Sony, but the screen flashes a lot. Do I have any other choices other than buying a new TV?

Is this an iphone question?
You have posted in the iphone forum.

A family member set up my time capsule, promises that it is set up correctly but the light on the capsule isn't green, it is yellow, what does this mean?

A family member set up my time capsule and sayy it's workign correcly but the light on it isn't green, it is yellow...what does this mean?

If the Time Capsule is operating normally, the light will be green.
If the amber light is blinking, something is not adjusted correctly, or there may be an update available for the Time Capsule.
Do you have the device that was used to set up and configure the Time Capsule there? Is this a Mac? If yes, we need to know what operating sysem it is using.
If you are not sure, click the Apple icon in the upper left corner of the screen and then click About This Mac. Post back with the OS X Version number that you see there.

HT204400 I turn my Apple TV on and it stays on the setting time anWoke d date scroeen. I've tried the menu button nothing happens except the light flashes about 3 times. I'm trying to connect it to my new wifi but can't cause it won't go on the menu. Gutt

My Apple TV won't go on the menu page it stays on the time and date screen.every time I press the menu button the light flashes 3 times. Been trying to connect my new wifi but can't cause it won't get of that screen. I've treys turning it off and one still no joy. Gutted. Heip

My Apple TV won't go on the menu page it stays on the time and date screen.every time I press the menu button the light flashes 3 times. Been trying to connect my new wifi but can't cause it won't get of that screen. I've treys turning it off and one still no joy. Gutted. Heip

I am trying to use the Filter-Render-Lighting Effects tool but the Lighting Effects is in light grey and I can not access it can anyone hel please

I am trying to use the Filter-Render-Lighting Effects tool but the Lighting Effects is in light grey and I can not access it can anyone help please?

Hi again is this what you are looking for?
Adobe Photoshop Version: 14.2.1 (14.2.1 20140207.r.570 2014/02/07:23:00:00)
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Operating System: Windows 8 64-bit
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Plug-ins that failed to load: NONE
Flash:
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Installed TWAIN devices: NONE
On Tue, Feb 24, 2015 at 10:29 PM, Benjamin Root Photography <

My macbook(2008) has been working well until a few hours ago. I tried plugging it in to several outlets but the light stays green no matter what, It will not charge. Also it will not stay on or turn on if I unplug it from the outlet, anyone have any idea

My macbook(2008) has been working well until a few hours ago. I tried plugging it in to several outlets but the light stays green no matter what, It will not charge on any outlet. Also it will not start when it is unplugged when my battery is at 50%. It also will shut down immediately if I unplug it from the charger, even though it says it isnt being charged by it. Can anyone help with this problem?

So you have the 13" aluminum notebook that just says "MacBook" on the display, correct?
You can get a new battery for $100 from Other World Computing here.
Alternatively, you can get one through Apple for $130 here.
I personally would go through OWC - they're a highly-recommended third party for these kinds of parts and their batteries work just as well as Apple's.
~Lyssa

Mac Pro will not boot, power light flashes once and then Mac switches off

One of our Mac Pro's will not boot. When pressing the power button the light will come on briefly and the Mac will just turn off again.
I have unplugged the power cable and held down the power button for 10 seconds but this did not help.
Any suggestions for me before I call up Apple?

Most indications from flashing power lights are telling you that there is not enough working memory to start up.

Trying to turn on my HP compaq d330 but red light flashing and beeping and nothing comes on

trying to turn on my HP compaq d330 but red light flashing and beeping and nothing comes on help a newbie please
This question was solved.
View Solution.

You can try removing and reseating the memory and see if that works.
If that doesn't work, remove all but one memory module (if the PC has more than one), and see if the PC runs normally with one memory chip. If it beeps, remove and replace with the memory you removed and keep doing that until you find the bad memory chip.

My appears to be working but amber light flashes

Just bought an airport extreme to improve my wifi for my apple tv and iPad it seems to work but the light keeps flashing amber.
Any ideas?

The flashing amber light indicates that a setting needs to be adjusted or there might be firmware update for the product.
What operating system are you using on the computer that you used to configure the AirPort Extreme?
If you have a Mac, and you are not sure....
Click the Apple icon in the extreme upper left hand corner of the screen and then click About This Mac to see the OS X version number.

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Hi,
My USB-6251's active light flashes once when turned on, followed by no further activity by either Active or Ready lights (both are off). The computer shows no recognition of the device. This is when plugged into a confirmed operating wall outlet and attached to a computer that previously recognized and used the device. I opened the device and can confirm that the replaceable fuse is not broken. Any ideas?
Cody

If you have been able to talk to the device before, then I am assuming that something must have gone wrong with the device itself. Best is to call NI's customer services and get the device repaired.
Adnan Zafar
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Coleman Technologies

Imac G5 will not boot up. there is power but the screen is black. About 30 sec after turning it on, the fan comes on loudly.

I have an old imac G5 (non Intel) The screen went blank but the fan turns very loudly. I cannot reboot the computer. whenever I start it I get power and black screen and the fan comes on loudly after about 30 secs. I have tried rebooting pressing varius keys, but no luck. I once got the flashing question mark, but I can't get that either. I'd like to reboot from the disc, but I cannot insert a disc. Any help out there??

If zapping the PRAM does not get it working, it's time for a new iMac. Repairs will not be worth the cost. Put it towards a new iMac.
I've been there, done that. Had my burial last summer.

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i have an I phone 4s i can see that its trying to power up, but the operating system can't engage.
Q; how do I restart operating system?

Solution depends on EXACTLY what you are seeing. Tell us a Story so we can experience in our mind's eye what you are experiencing in real life. a Short Story will likely do. - ÇÇÇ

G4 dual 1 gig.. no power, but the light flashes once?

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