Blinking question mark on startup - tried lots of things - advice?

Hi,
A friend called me yesterday about a two year old iMac. Got the blinking question mark on startup. So I went over, tried disc utility, but disc utility (off the iMac's install disc) could not even see the hard drive. So I tried TechTool Pro. Same result. TechTool from AppleCare disc, same result, DriveGenius, same result, start up in single user mode, same result, targeted disc mode connected to my MBP, same result, Data Recovery II, same result, connected a Mac via FireWire and started up from that and ran those same diagnostics, same result. None of those could even find - much less repair - the hard drive. It still shows a blinking question mark. It seems like all the hardware is working fine (motherboard, display, etc), except the hard drive. Any advice?
Thanks!
Russ Conte

The machine must be a G5, or it would be older than 2 years. And no AppleCare or it would be in the shop before this. The most likely cause is hard drive failure, as already stated. A fact of life is that all hard drives will fail or have failed.
You can deal with this, providing you can handle a screwdriver. Go to the support area of the Apple Website and click "Manuals" instead of discussions where you are reading this. In the block "search manuals" type "Imac Hard Drive". The next step is to select the instructions for correct machine, and download.
Cost of replacement drives depends upon capacity. One source is macsales.com.
A new drive will have to be formatted. Easy to do prior to installation by connecting to any Mac with a Universal Drive Adapter via a USB connection. That adapter is also available at macsales and other places.
Final step after installation is to install the OS hopefully from the original disks.
Good luck to you.

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Boot into your 10.6 Install disk again at the top menubar > Utilities > select Disk utility and in there select your new hard drive, and select the tab Erase and choose to make the format as Mac OS Extended Journaled. When that is finished look in the main window to make sure that the partition map scheme says GUID Partition Table.
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PowerMac G5: Blinking question mark at startup

I have a 3 1/2 year old G5. When I boot it up, it goes straight to the blinking question mark. I've reset the PRAM, no change. I've tried booting off an installation disk. That gets me to the Apple logo, then the logo pixels go kinda funky and it freezes. I don't hear the hard drive at all during this process; it does not spin up. The CD/DVD drive is obviously spinning, but as I said, it won't boot off an installation disk (I tried three different disks).
I'm assuming the hard drive is bad, but I don't know. I've never had a problem with a Mac before! Does anyone have any suggestions? I don't think of a 3.5 year old Mac as being that old, but I'm a bit nervous about dropping a new hard drive in and wondering if I should just get a new system.
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I'm having this same problem with a system I just replaced a logic board in. Won't boot off of HD or CD. The HD that is in it is a brand new drive from a different power-mac (the HD from the dead box was moved to the new powermac to get that user back online) so it should be ok, but regardless of that, it won't boot of CD/DVD either.
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Only get blue scrren and blinking question mark on startup

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I get a gray screen with a folder icon and a blinking question mark on startup. Is this bad?

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Blinking question mark and folder on startup

Hi everyone,
I'm in need of some help. I turned on my mac today and got a gray screen with a little folder icon and a blinking question mark in the center. I'm on a G4 running OS X Tiger. I'm trying to boot using the startup disk but here's the problem, I have an external dvd drive connected by firewire, so the only way I can startup the Tiger dvd is from that external dvd drive. I put the dvd in (only my monitor, mouse, keyboard and the dvd drive are plugged in), restarted, pressed 'c' got the installer menu, went to disk utility but the only hardrive it shows is for my dvd drive (2.6GB LaCieGroup SA) and the icon of the dvd underneath, it does not show the macs hardrive.
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Welcome to Apple Discussions.
Regrets you're experiencing difficulty.
In the absence of any additional details about your scenario, here are my two cents.
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If you live near to an Apple Store or authorized Apple service shop, you could bring your G4 to a technician there and request a diagnosis.
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[Texas Mac Man's PRAM, battery, PMU tutorial|http://www.geocities.com/texas_macman/pram.html]
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[Resetting Cuda/PMU on Power Mac G5, Power Mac G4, Power Macintosh G3|http://docs.info.apple.com/article.html?artnum=86760]
Message was edited by: Limnos

Blinking question mark folder with only OS X base system left

Yesterday I turned my laptop on to see a blinking question mark folder. I searched through a lot of people questions with the same problem however mine is not the same because I only have the OS X base system left. I can't redownload the OS X lion because there is nothing to download it after I chose the option to redownload it. I see that most people have the Macintosh HD but I don't have anything like that.
disk1
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Have you tried booting to your Recovery HD (if you are running Lion or Mountain Lion?) If not and if you were running Lion or Mountain Lion, then:
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
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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.

My iMac has a blinking question mark folder on it and won't let me boot.

I have a late 2009 27 inch iMac whos hardrive failed a while back. A couple days ago i decided to pop in a new hard drive in it, the same brand, just different capacity. I wanted to put windows on it, and tried to boot it with pressing c on the keyboard at startup but encountered a few problems.
When i power on my imac the screen is just a blank white screen for about 20-30 seconds. During this time, any devices plugged into the USB ports do not work. My mouse is not lit up, and my keyboard will not react to pressing caps lock, num lock etc. After that 20-30 second period the folder with the blinking question mark on it pops up. I tried holding C, as well as windows key and C but nothing seems to make the mac recognize i want it to boot from other devices.
The hard drive i installed is empty (obviously) So i'm not sure if its an issue with the way I installed the hard drive (pretty sure i did it right) or another issue that may involve trying to put windows on it. Also worth noting is im using a normal USB mouse, and a normal USB keyboard, not mac devices. I'm willing to put OSX on this computer if its necessary to make it work, but right now all i can get on it is that white screen and then the blinking folder. Does anybody have any idea how to fix this?

Drive Partition and Format
1. 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 Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Apply button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
When formatting has completed quit Disk Utility and install OS X.

Blinking question mark on startup - tried lots of things - advice?

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