700 MHZ iMac g3 won't boot up

Hi I'm having a bit of a problem with my iMac g3. it's the 700 MHZ snow edition and it's not wanting to start up. although I hear the cd drive spin up as there is a cd in the drive and I also hear a faint crackle from the CRT Monitor but I don't hear a startup chime and there is no power light or display on the screen

Probably a power supply problem which are hard to fix.
Resetting your Mac's PRAM and NVRAM
http://support.apple.com/kb/HT1379
reset the PMU
http://mrjcd.com/junk/PMU.jpg
Shut down the Mac, then power it up, and before the screen lights up, quickly hold down the Command, Option, P, and R keys, until the Mac has chimed twice more after the powerup chime. Then, before the screen lights up, hold down Command-Option-O-F until the Open Firmware screen appears. Then enter these lines, pressing Return after each one:
reset-nvram
set-defaults
reset-all
"The reset-all command should restart your Mac. If so, you have successfully reset the Open Firmware settings."
http://support.apple.com/kb/TS1812?viewlocale=en_US

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I have an iMac that won't boot up. I've read all posts on this subject to no avail. When power is switched on, it chimes, Apple logo appears, spinning wheel, then loading bar starts to fill. It gets to about 25% then switches off! Help please!

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http://osxdaily.com/2009/08/28/eject-a-stuck-disk-from-your-mac-dvd-super-drive/
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OK, thanks, that was a helpful reply.
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2) the AHT tells me nothing about my HDD - as if it's not there.....
I make two conclusions from that; namely that one RAM block is faulty and the HDD is invisible seen from AHT. The latter would stress me immensely, if I hadn't seen the entire drive from single user mode before. There could be some faulty sectors though that would mean that the OS is behaving strangely.
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IMac G5 won't boot from CD drive, Please Help

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http://www.tuaw.com/2010/10/22/mac-101-whats-happening-when-your-mac-is-starting -up/
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Hello, can someone help me: my eMac G4 700 MHz. I can not boot it. If he starts appears on the screen, only a small "folder with a question mark." The Mac was not used 1 year. Question 1: Problem = hard drive? Question 2: Problem = PRAM battery? the What

Hello, can someone help me: my eMac G4 700 MHz. I can not boot it. If he starts appears on the screen, only a small "folder with a question mark." The Mac was not used 1 year.
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Restart with the Option key held down.
If the internal drive shows up, it's the PRAM battery.
If it doesn't, insert a compatible Mac OS 9 or X install disk, click the button with the circular arrow, and either repair the internal drive or install a new OS on it. If it doesn't show up in Disk First Aid(9) or the Disk Utility(X), it's either not plugged in or needs to be replaced.
(97530)

I have an iMac that won't boot up. Chimes, Gray screen w/ apple icon, spinning gear and progress bar at bottom, about 20 sec then shuts off.

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Hello,
I've scoured the web looking for answers, and can't find any, so maybe someone here would be kind enough to help. I'm working on an imac 350 blueberry for my sister and I'm having all sorts of trouble.
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When I said "but dies when it tries to boot" and "..then no response." I meant that the keyboard works to power up the computer, but won't work for anything else. So, I am figuring that the usb ports are supplying power to the keyboard and mouse, but the usb ports aren't relaying information from the keyboard or mouse.
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The poweron key is a special case. I think that it works by lowering/changing the voltage on one of the usb cables. I read about this somewhere. Anyway, this function was eliminated from later usb keyboards and macs. Maybe a working power button doesn't mean what you think.
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Could you try powering up from the machine? Is there a power button on the lower right of the machine?
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You could try another usb keyboard.
We actually did boot up the computer several times with it upside down. Not for any reason, except it's become a real PIA to flip it over every two minutes to start it, then take it apart and boot again. When booting either upside down or right side up it shows the same thing - blinking folder w/finder icon and question mark.
Yes, I agree. You could try removing the clear plastic around the bottom of the machine. At least you will not have to slide in the carriage. Note. The tv portion will still be surrounded by plastic! Don't remove the plastic around the tv!
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Hey,
New member here.
I have an Imac 20" 1.8 Ghz PowerPC G5, running Mac OS X 10.4.9.
My problem is my computer won't boot from from any DVD or Cd, not the original system disc (10.3.5), not from a newer Imac system disc (10.4.7), not from a Disc Warrior 3.03 disc.
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Rufmanj

To Apple Discussions.
Please check out the following thread which the original posted had the same error you had.
http://discussions.apple.com/message.jspa?messageID=4459207#4459207
You may find some helpful troubleshooting solutions in the above thread.
Make absolutly sure you are using the "DVDs" that originally came with the computer.
Also, see Knowledge Base Article; http://docs.info.apple.com/article.html?artnum=106805 Mac OS X: "Broken folder" icon, prohibitory sign, or kernel panic when computer starts

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Hi, I am completely flummoxed.
Yesterday I had my iMac G4 networked (via FireWire cable) to my MacBook Pro. I was copying about 14 GB of data from the MBP to the G4. The MBP indicated the copy operation was finished, but the G4 went into a spinning beachball, from which I could not escape -- couldn't force-quit, change applications, open terminal, or anything. So I (reluctantly) did a hard power-down.
When I went to restart the G4, I got a grey screen of death -- for about 2 minutes. Then the screen goes black for a second, then goes grey again, this time with the alternating folder-and-question-mark icon. Bad news.
Here is what I have tried so far:
* Won't boot into target mode -- if I hold down T at startup, the screen stays black (never gets to the grey screen, or to the FireWire icon).
* Won't boot into single-user or verbose mode -- if I hold down cmd-S or cmd-V, computer stays grey.
* Won't boot in safe mode -- ditto.
So my next idea was to try booting from a startup disk. But how to open the optical drive tray? (This is a tray-loader, not a slot-loader.) I pulled down the white external door manually, but do not see an emergency open pinhole inside. But there must be one, right?
Does anybody have any other ideas on how I can break into this thing, or what might have gone wrong with it?

So my next idea was to try booting from a startup disk. But how to open the optical drive tray? (This is a tray-loader, not a slot-loader.) I pulled down the white external door manually, but do not see an emergency open pinhole inside. But there must be one, right?
I'm not at a G4 iMac right now, but other tray-load drives of that generation had a hole but ti's very low in the opening. Probably need a good light to see it.
Try starting the computer and holding the mouse button down while it's trying to boot. This is a startup shortcut to open the drive but may require that the system start to load, something with which yours is obviously struggling.
Does the iMac have the original Apple keyboard? Some third-party keyboards may not support the startup combos for safe mode, single-user, etc.

IMac G5 won't boot, only White Screen

I have an iMac G5, no iSight, it won't boot up. It briefly displays the Folder icon with blinking question mark, then White screen. The first time it happened, I rebooted from an external Firewire drive, but only once. When I tried that again, it would not boot.
I disconnected all external devices, no boot.
I can't do Target Disk mode, can't boot from external disk (except that one time-weird exception), can't boot from Install CD. It WAS Open Firmware password protected, but I can't remember if I disabled it or not agfter my last hardware failure. (Note to the wise: if you have an older machine, don't use Open Firmware Password, it can greatly complicate troubleshooting when the inevitable failure happens).
I MAYBE have Open Firmware password enabled, since I
However, I CAN boot into Open Firmware (Cmd-Opt-O-F), I did manage to eject the Install CD that was stuck.
So I opened the back of the iMac. All three LEDs are good, indicating good power supply. I reset the SMU using the little button switch, then tried reboot with the little power button switch. Still no reboot. I tried re-seating the RAM cards, still no reboot.
I'm at the end of my bag of tricks. Does anyone have a suggestion? Is it a hardware problem?
thanks from San Francisco

Well you could try to reset the PRAM, but if your drive is dying it won't help, although it's worth a try.
You can also try using Disk Utility:
Disk Utility
1. Insert the Mac OS X Install disc that came with your computer, 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. (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. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair. Disk Utility checks and repairs the disk.
If none of that works, it's time to take it in.

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I have an older iMac G5 that has always been a little flakey...it would just shut off for no reason intermittently. For the most part, I could deal with that as this is no longer my primary Mac, but when I did the last iOS update, my external TimeMachine drive started getting errors - won't write because the drive was read only and now, when I turn on the computer, it won't boot...the fan just runs loudly.
I researched this and tried the following:
Reset the SMU - didn't resolve
Unplugged everything and rebooted - didn't resolve
So I have a couple questions since I'm ready to toss this computerI have a current Time Machine backup, but don't have a machine to restore to
Is there a way for me to get at the Time Machine backup (I think I can just plug it into another Mac)?
How can I get my iPhoto, iTunes, iMovie, etc. files off the backup and is there a way to import them into my existing applications on my MacBook Pro?
Any help would be VERY much appreciated!!

You may have the old exchange/repair program power supply capacitor issue on your iMac. You might be able to find another on my FAQ*:
http://www.macmaps.com/usedrefurbished.html
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