G4 Imac 17" "sunflowers" issues - ehMac.ca
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Old Oct 15th, 2019, 10:36 PM   #1
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Lightbulb G4 Imac 17" "sunflowers" issues

i will post more specs later, but i am having issues booting from Hard drive as it will not see it at all.

It simply won't find the internal hard drive. it does boot from the cd. Target disk mode shuts down the machine. no firmware password and i did reset everything via Open firmware including zapping the ram 3 times and replaced the Pram battery. ATA ribbon was replaced, still can't find the HDD when i boot from the bootable mac os x 10.2.

I can hear the hard drive spinning.

Any Firewire hard drive are also not seen. USB? not seen

Thanks
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Old Oct 16th, 2019, 02:17 PM   #2
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Any Firewire hard drive are also not seen. USB? not seen
Do you mean they are not mounting on the desktop or they are not showing up in Disk Utility or under Startup Disk preference pane???

Usually any drive that does not mount or show up has died and has used up its lifetime.

Quote:
I can hear the hard drive spinning.
That could also be the noise from the fans thought you are hearing, and not necessarily from the drive itself.

It sounds like that drive has died.



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Old Oct 16th, 2019, 10:54 PM   #3
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This is ancient history, but I believe that not all hard drives could be recognized by the G4s through FireWire--only some models and brands. I agree with pm-r that your original HD is probably toast.
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Old Oct 17th, 2019, 11:11 AM   #4
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This is ancient history, but I believe that not all hard drives could be recognized by the G4s through FireWire--only some models and brands. I agree with pm-r that your original HD is probably toast.
Experience with my MacPro might also suggest that having a dead HD could impair your computers ability to recognize other devices. Also as always replace the clock battery, probably not the issue here, but it's cheap and it can't hurt.
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Old Oct 27th, 2019, 12:37 PM   #5
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Quote:
Originally Posted by pm-r View Post
Do you mean they are not mounting on the desktop or they are not showing up in Disk Utility or under Startup Disk preference pane???

Usually any drive that does not mount or show up has died and has used up its lifetime.


That could also be the noise from the fans thought you are hearing, and not necessarily from the drive itself.

It sounds like that drive has died.



- Patrick
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once i boot from the cd "installation disk" 10.1. when it ask to choose the destination disk, none of the drive are showing. i did replace the hard drive and still can't see it as a master jumper installed just like the previous drive was set up.

i know that drive was working as i did a wipe and did a benchtest and all was in good working order. i tried to boot from the usb drive, but nothing. if i press T for target disk mode, the mac will shut down. there is no firmware password set up on that machine.



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Last edited by AquaAngel; Oct 27th, 2019 at 01:54 PM.
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Old Oct 27th, 2019, 02:51 PM   #6
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I don't think any of the PowerPC Macs will boot from USB. I'm pretty sure USB booting only came in with the Intel Macs.

You should be able to boot from an external firewire drive if it has a valid operating system. Target Disk mode will also have to be done through firewire on PPC Macs.

The OSX boot CD should allow you to access Disk Utility from one of the top menu options. Try looking under the Apple icon menu at the upper left. If it's not there, then try all the other menu headers. I know this was available in a 10.4 (Tiger) boot CD or DVD, but not sure if the really old OSX installer that you're using has it. It could be that the drive isn't properly formatted for this version of the OS, and can't be seen. Disk Utility should allow you to at least see the drive if it's there. It will also allow you to format and/or partition the drive so the OS can be installed.

It's been a while since I worked on an old lampshade G4. I seem to recall the hard drive was not that easy to access. Maybe a cable wasn't hooked up right somewhere in the process. Is it really worth all the trouble?
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Old Oct 27th, 2019, 08:11 PM   #7
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Originally Posted by Rob View Post
I don't think any of the PowerPC Macs will boot from USB. I'm pretty sure USB booting only came in with the Intel Macs.

You should be able to boot from an external firewire drive if it has a valid operating system. Target Disk mode will also have to be done through firewire on PPC Macs.

The OSX boot CD should allow you to access Disk Utility from one of the top menu options. Try looking under the Apple icon menu at the upper left. If it's not there, then try all the other menu headers. I know this was available in a 10.4 (Tiger) boot CD or DVD, but not sure if the really old OSX installer that you're using has it. It could be that the drive isn't properly formatted for this version of the OS, and can't be seen. Disk Utility should allow you to at least see the drive if it's there. It will also allow you to format and/or partition the drive so the OS can be installed.

It's been a while since I worked on an old lampshade G4. I seem to recall the hard drive was not that easy to access. Maybe a cable wasn't hooked up right somewhere in the process. Is it really worth all the trouble?
The valid bootable disc does have the disk utility in it, but it does not see the drive at all, i have replaced the drive with 3 different drive and the results are still the same Like i said, the target disk mode shuts down the computer when T is pressed while booting.
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Old Oct 27th, 2019, 09:20 PM   #8
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i have replaced the drive with 3 different drive and the results are still the same

Not trying to sound like a smart ass here, but are the three different drives you have tried actually known good working units, and also how are the connectors and connections???

If that FP iMac is booting and running properly from the install CD/DVD, then I would suggest either the internal drive and its format or its cable is goofy or kaput.


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Old Oct 28th, 2019, 12:21 AM   #9
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Quote:
Originally Posted by pm-r View Post
Not trying to sound like a smart ass here, but are the three different drives you have tried actually known good working units, and also how are the connectors and connections???

If that FP iMac is booting and running properly from the install CD/DVD, then I would suggest either the internal drive and its format or its cable is goofy or kaput.


- Patrick
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OK, let me put it this way. i have 10 SCSI hard drive. all of them have been tested. Of course all of them have different sizes. All of them have passed the test, no bad block(s). the ribbon have been replaced and the symptom are still the same. i have tried the Slave jumper, no go, master, no go, cable select still a no go.

Hard drive has been put into another mac and works flawlessly, but it doesn't work on that specific G4. is it bricked? that is what i am wondering. i have tried a different Firewire cable and the symptom is still the same. EVEN if nothing is connected at the back of that machine! it still shuts off when trying to get into the target disk mode.
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Old Oct 28th, 2019, 01:15 AM   #10
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OK, let me put it this way.

OK, let's start again and get some basic information like what exact G4 iMac model are you working with???

You can find them all listed here"
https://everymac.com/systems/apple/imac/index-imac.html

There you can read some of the information on the typical model:
https://everymac.com/systems/apple/i...800_17_fp.html

I didn't see it mentioned what size your SCSI hard drives are, and you will probably notice that not all of those iMac models will support "big drives".

Also, some of the models also have other limiting factors and can be quite fussy as to what goes into their innards. The same with the Mac operating system versions.

If it helps, there is a whole page on replacing hard drives in those models here if you haven't read it already:
How do you replace or upgrade the hard drive in the iMac G4 models? Which models support "big drives" and which do not?
https://everymac.com/systems/apple/i...ig-drives.html

BTW: is there some specific purpose or reason you are wanting to resurrect such an old iMac model???

If I recall, for the little I worked with any of those models, is that they could be very finicky and specific of what could be replaced.

I'm not even sure that Apple didn't restrict hard drive replacements to their own custom built drives.

Anyway good luck with your project, and maybe someone out there in Googleland has some of the answers you are looking for.

You may want to even consider getting and using an external firewire Drive as a boot Drive if you just need to get the unit working.



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