G4 shows folder with blinking question mark on start up

I bought my son a used G4. It worked well. We noticed it had 2 hard drives and only one was hooked up. We plugged in the second one, rebooted it and it will not load X, 4.2. Tiger. It worked fine before so we unplugged the second hard drive plugged in the first on as before and we have the same problem. I have tried to boot from the install disc but it will only let me verify the drive not to repair it. Help please.

Look at A flashing question mark appears when you start your Mac
http://docs.info.apple.com/article.html?artnum=58042
If two drives are installed, the jumpers on one must be located for Master & the jumpers on the second drive located for Slave. There should be a label on the drives showing the proper jumper locarions.
 Cheers, Tom

Similar Messages

IMac wont boot Past Grey Screen, finder folder with blinking question mark

iMac G5 won't boot Past Grey Screen. The G5 froze and i restarted, It will not go past the grey screen and it has the finder folder with blinking question mark, also the fans kick on wide open. As it atempts to boot a sound plays "beepda beepda beepda beep" that starts quiet and gets louder and repeats a couple of times. I ran a hardware check on the startup disk and all hardware passed. I thought it might be the RAM any suggestions?
I have restarted using the troubleshooting methods in the guide.

Sorry for the late reply. The drive shows up when booting to disk, but it will not allow you to verify disk or repair. Also it will not allow you to select the hard drive to reinstall the software. Under disk utility Maxtor sabre shows up with total capacity:0 bytes.
I've taking the Mac to the Apple store to get looked at, and its probly the hard drive. Now Im trying to see if theres a way to recover the data myself. I've used software like "Data Rescue" the hard drive shows up "Maxtor Sabre" totally capacity: 0 bytes, and it will not recover anything.
Did this test just to see if it was power problem.
http://support.apple.com/kb/HT2173
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Have a flashing folder with a question mark on start-up but cannot hold option as wireless keyboard won't connect, how do I get it to connect if I cannot turn on the machine?

Hello all, I've registered here because I can't work out how to get my keyboard and mouse to connect.
The issue is that when I turn my mid-2010 iMac on it doesn't load up, but instead shows a flashing folder with a question mark. I've Googled this and have some idea how to fix it, the first step in all guides to fixing the problem states that you should hold the option key upon start-up. The problem I'm having is that I've just had to change the batteries on my keyboard and mouse and they are now not connecting. I can't see how to get the keyboard and mouse connected with the Mac stuck on the flashing folder screen, and I can't get the Mac past said screen without using the keyboard. Does anyone know how I can connect the two devices?
Thanks.

The flashing folder with the ? mark indicates that a bootable system can't be found. You'll need to borrow a wired keyboard so you can boot into the Recovery volume (boot with the Command + R keys held down). From there you can reinstall the system and try a normal reboot.

Flashing file folder with a question mark when starting my macbook after a few minutes it shuts down, any ideas??

When turned on our Macbook flashes a folder with a question mark in the center screen, then it shuts down after a few minutes. Doea anyone have any ideas how to boot the computer back up?
Cheers

That folder with the question mark icon means that the MacBook can't find the boot directory. That can either mean it can't find the hard drive or the Operating System data on the hard drive is somehow corrupted.
Put your install DVD into the optical drive and reboot. As soon as you hear the boot chime, hold down the "c" key on your keyboard (or the Option key until the Install Disk shows up). That will force your MacBook to boot from the install DVD in the optical drive.
When it does start up, you'll see a panel asking you to choose your language. Just press the Return key on yourkeyboard once. It will then present you with an Installation window. Completely ignore this window and click on Utilities in the top menu and scroll down to Disk Utility and click it. When it comes up is your Hard Drive in the list on the left?
If it is then click on the Mac OS partition of your hard drive in the left handlist. Then select the First Aid Tab and run Repair Disk. The Repair Disk button won't be available until you've clicked on the Mac OS partition on your hard drive. If that repairs any problems run it again until the green OK appears and then run Repair Permissions.
If your hard drive isn’t recognized in Disk Utility then your hard drive is probably dead.

Getting a flashing folder with a question mark when starting Imac.

I got this flashing folder with a question mark on it when starting my Imac this morning. Im running on Osx 10.6. I put it in target disc mode and connected it to my macbook pro. I opened the disc utility app on the macbook and found my imac. I "verified" it and found an error. When I clicked "repair" the disc utility app froze and crashed. When I opened it again my Imac didn't show up. I've restarted both computers several times with no luck. Whats my next step?

Hi.
Try restarting your iMac while holding down the option (alt) key until the spinng gear appears. You should momentarily be presented with a list of startup drives to select.
Choose Macintosh HD (your normal startup disk drive) and click the right-arrow.
When your iMac boots, go to System Preferences > Startup Disk and again select your normal startup disk. Then click Restart.
I hope this is helpful.
EDIT - disconnect the machines from each other first.

PowerBook G4 Folder With Blinking Question Mark & Finder Icon At Startup

Hi I'm a MacBook Pro user but I just dropped my friend's PowerBook G4. It froze afterwards so I held down the power button to restart it but then everytime it starts up, a folder with a blinking question mark and finder icon shows up.
I tried restarting with the ctrl + command + power button but it shows up with the folder everytime.
She didn't have her installation disc 1 but right now disk 2 is in the laptop and we can't get it out.
How can I resolve this? Thank you!

The folder with the blinkiung ? indicates that the Mac can't find a bootable OS. Try restarting holding down the track button to get the disk out of the drive.

Flashing folder with a question mark wont start up

flashing folder icon with a question mark on screen....computer wont start up

Here's an Apple article on the subject.
http://support.apple.com/kb/TS1440
Regards,
Captfred

HELP I'm getting a blinking folder with a question mark at start up? Have been trying to fix this for 3 hours and I dont want to lose all my files by resetting it completely!!

I currently have Mavericks but my original OS X disk that I have I'm pretty sure is Mac OS X 10.6.6. I'm not great with computers but am usually able to fix problems I have had with mine in the past. I have reinstalled and reset my computer to factory settings before, but I am locked out of my computer completely & can't get to my files to save them & I really dont want to lose them. I was in Safari earlier opening a file, the page started to not respond & froze up my whole desktop so I did a hard shutdown & restarted my computer. I haven't been able to get back into my account ever since. If my only choice is to lose my files & reinstall everything, I need detailed instructions because I actually attempted to do this at first, out of desperation to fix my computer & the installer was asking me to select what disk I wanted to reinstall lion to yet I dont have a disk for that nor do I know what it exactly is asking of me? Please help

Question (?) Mark, Blinking Folder, or Gray Screen at Startup
These are related but not identical issues. Their causes are outlined in Intel-based Mac- Startup sequence and error codes, symbols. Solutions may be found in:
A flashing question mark or globe appears when you start your Mac
Mac OS X- Gray screen appears during startup
In most cases the problems may be caused by one or more of these:
a. Problem with the computer's PRAM - See Resetting your Mac's PRAM and NVRAM.
b. Boot drive's directory has been corrupted - Repair with Disk Utility.
c. Critical system files are damaged or deleted - Reinstall OS X.
d. The disk drive is physically non-functional - Replace the hard drive.
Note that the information I have provided is what Apple recommends, If other users suggest different solutions than found here, then be sure what they recommend does not impact on your warranty, if any, or ability to get continuing Apple service.
Please don't start removing drives or changing cables unless you know what you are doing and have exhausted other non-invasive alternatives outlined here. If you perform any work yourself that is unapproved by Apple, then you will void any warranty you may have and lose all further Apple Support.
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
The main difference if you are using Lion or Mountain Lion is that you must first boot from the Recovery HD. Simply boot from the Recovery HD to perform the above.
Reinstall Snow Leopard Without Erasing The drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.
Reinstalling Lion/Mountain Lion Without Erasing The Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

My imac has folder with blinking question mark

Hello, I turned on my 2008 iMac intel (MA876LL/A) this morning and it's stuck on a white screen with a folder and question mark inside it. Do anyone know what's wrong? Throughout my PCS moves unfortunately I lost the orginial disks to it and I have no applecare plan. PLEASE HELP!

Question (?) Mark, Blinking Folder, or Gray Screen at Startup
These are related but not identical issues. Their causes are outlined in Intel-based Mac- Startup sequence and error codes, symbols. Solutions may be found in:
A flashing question mark appears when you start your Mac
Mac OS X- Gray screen appears during startup
In most cases the problems may be caused by:
Problem with the computer's PRAM - See Resetting your Mac's PRAM and NVRAM.
Boot drive's directory has been corrupted - Repair with Disk Utility.
Critical system files are damaged or deleted - Reinstall OS X.
The disk drive is physically non-functional - Replace the hard drive.
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
The main difference if you are using Lion or Mountain Lion is that you must first boot from the Recovery HD:
Boot From The Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Reinstall Snow Leopard Without Erasing The drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.
Reinstalling Lion/Mountain Lion Without Erasing The Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

Boot problem: sometimes I get a folder with a question mark at start up

I am having a problem lately which I think might be hardware related. I get a question mark in a folder icon on start-up This happens randomly. In most occasions it occurs when I do a cold boot (so the system has been off for a while). As soon as I switch it off and switch it on again, my Mac Pro starts fine. The hard-drive is "verified" in the disk utility and I tried to fix/repair permissions. I also cleared the PRAM, did a firmware reset (option key on startup) and repair disk using the installation DVD. All these thing do not seem to work. I also had this issue sometimes in Tiger.
I do not have a library/receipts folder as someone indicated. I am running 10.5.1
I haven't had any other issues with Leopard so far.
I am wondering if this issue might be hardware related. The S.M.A.R.T. status of my boot up disk is "verified" and I have no other issues in Leopard (no crashes/freezes). So if it is my hard-disk, why does this only occur at startup and not randomly when using other programs?
Any suggestions? I have 3 year Applecare so if there are no solutions... I might use that.

This may occur for several reasons. One may simply be that you need to set the startup volume in the Startup Disk preference - open Startup Disk, select your startup volume, click on the Restart button.
However, more often this is indicative of a problem with one or more required system files for startup. If the problem is simply cache related then you may fix the problem by using a utility such as TinkerTool System or Leopard Cache Cleaner to clear out the system caches then do a restart. However, if you truly have a bad system file then only re-installing OS X is going to fix the problem. You may be able to do this by Archive and Install which doesn't require erasing the drive provided your drive is OK and you have adequate disk space.
How to Perform an Archive and Install
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger, 4.1 for Leopard) and/or TechTool Pro (4.5.2 for Tiger, 4.6.1 for Leopard) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.

Ibook Clamshell Shows folder with a question mark when its turn wont start

I have an ibook clamshell which was passed down to me from my cousin it was workin fine for a while and i just put it aside so i could save up and upgrade it to tiger. But just yesterday i turned it on and it did what i guess was a disk check which had one button on the left which was to retry the search and another to continue forward.when the search is done it doesnt show anything and when i click forward the page jus either blink(a really quick flash ()rarely though) or does nothing.I have only tried rebooting the clamshell to resolve the problem. Im not sure of the spec of this computer but i know its a ibook clamshell graphite, 1 usb port,,1 ethernet port i believe thats what the firwire or fireware port is, and one other port that the size of a telephone line. Sorry but i am un aware of the mhz and it does not have an airport card installed in it. So if anyone has any idea what i can do to save my laptop besides purchasin a new one please help me thank you.

...1 ethernet port i believe thats what the firwire or fireware port is...
The Ethernet port is not the FireWire port.
The picture below shows (from left to right)
Internal 56 Kbps modem
10/100 Base-T Ethernet
USB (Universal Serial Bus) 1.1 port
FireWire
Video/Sound output
The ports on a non-FireWire iBook are shown below:

Folder sybol with a question mark on start up

When I start up my G5 desktop I get a folder with a question mark on start up. I have seen this before when the computer cant find a start up but this sybol dissapears after a few seconds and the computer completes its start up. Can I get rid of this?
Many thanks
Alf

Yes, this happens if another startup volume was selected and not changed back after being disconnected from the system. Apple menu -> System Preferences -> Startup Disk is where startup volumes get selected. Go back there and change it to the volume you want to startup.

My Intel iMac only shows a blinking folder with a question mark when powering it up. What can I do besides running the hardware test of the original installer disc.

My Intel iMac only shows a blinking folder with a question mark when powered up.
I did run the hardware test of the original installer disc and no trouble was found and I am out of options. Does anybody have any advice what to do next

If the drive shows errors then repair, if after the 3rd pass of Repair Disk in Disk Utility it still shows errors it's telling you it's time to be replaced. Take it to your local Apple Store or AASP for repair, when it comes back use your backup (either Time Machine or bootable clone) to restore so you can pick up where you left off.

My MacBook Pro turns on and only shows a folder with a question mark and blinks. The computer will not continue start-up. Suggestions/Advice?

I'm not sure how this screen is appearing, but I tried powering up my computer this morning and it immediately presents a grey screen, then displays a blinking folder with a question mark in the middle of it.
I am looking for troubleshooting advice and procedures to bypass this screen and allow my computer to complete it's start-up.
Thanks-
Gary D. Aston, Jr.
[email protected]

The folder with a question marks is usually an idication that the Mac can't find the system file to boot from.
Since you never told us which system your Mac was running there is nothing more to say.
Allan

File Folder with a Question Mark Blinking-HELP!!!!

Its been like a day and half since i last used my macbook, and all of a sudden it won't work.
It still turns on but it goes to a white screen and stays that way for about 20 minutes. Then a file folder with a question mark in the middle shows up and blinks. It doesnt go away at all. The only way for me to make it go away is to either turn it off or to push the eject button, and now it just turns off all together.
When all this started happening it took a long time for it to even go to the home page, but it didn't go to the desktop screen. It would take a long time on the screen when it first turns on then a a lonnnnngggg time after that it would go to a light blue screen and then a longgggg time after that a pointer would show up, and thats all it would do.
Do I need to get the software that first came with it and put it in and see if it fixes the problem or what?
WHAT SHOULD I DO?!?!? please help.

You have corrupted system files. The following is a solution:
How to Perform an Archive and Install
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.

G4 shows folder with blinking question mark on start up

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