Flashing folder with question mark at Startup

Here is what I know so far.
- The computer was powered off by pushing the power button without shutting down.
- The computer was then restarted and it was coming into the white screen with the Apple logo in the middle, but i noticed that it was skewed slightly (like someone took a 4:3 ratio screen and stretched it to a 16:9) and then it would show a circle slash icon and then the flashing folder with a question mark on it.
- It would not come up in single user mode (Command + S) and it said that there was an error loading kernel 'mach_kernel'
- It would not come up in safe mode (Shift)(The flashing folder came up again)
- I reset the PRAM (Command + Option + p + r) and it seemed to fix the problem with the stretched screen but did not help the boot situation (still got flashing folder)
- I did the start up where you can select the hard drive to boot with, it owed the HD and i selected it, but then i got the flashing folder with question mark.
- It would not come up in Verbose Mode (Command V) Error loading Kernel again.
- I bought a FireWire cable and hooked it to another MacBook Pro, and booted the faulty Mac into Target Disk Mode, the FireWire logo came up on the screen and bounced around like all forums said that it would, but the drive would not show up on my host. I checked the System Profiler on the host and it did acknowledge the Target Disk Mode was there, but the drive of the target would not show up on the host. I restarted the host, nothing. I checked all of the connections, nothing. I replugged all of the connections, nothing. I even reversed the FireWire cable, nothing.
- I have DiskWarrior 4 if i can get the drive to show up in TDM, but nothing so far.
Does anyone have any suggestions?

Thanks for your help guys. I managed to get the computer started by holding down C at the Start Up with the Install Disc 1 in the computer. The disc was really kindof unnecessary, as the newest version of Mac OS X (10.4.10) became available via the hard drive.
I then found out that the battery was not installed, so I reset the management system by removing the A/C power, the battery and pushing the power button for 5 seconds, and then reconnecting everything. It did not help, the battery is bad i guess, so I am going to call AppleCare and get a new battery.
Thanks for your help.

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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.
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Hi buddies, I've an old macbook (those with pretty die hard silver case).
last night when i just turned it on, after days a flashing folder with a ? mark on it appeared... and nothing..!
I read this A flashing question mark or globe appears when you start your Mac
but i wanna know if my datas on my hard disk would be safe or not... and what should I do keep them safe.
If I loose my files and data, you can name me dead!!!

Your data are safe if you have them separately backed up. Otherwise, there is no assurance they are safe. Given the nature of the problem it's too late to backup your data, so you will need to try reinstalling OS X and take your chances all will work out well. Hopefully, it will.
If you have Snow Leopard installed:
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Download and install Mac OS X 10.6.8 Update Combo v1.1.
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Flashing folder with question mark on start up + many other issues

About 6 months ago I first encountered the flashing folder with question mark on startup. I fixed the issue myself by unplugging the mouse and keyboard and rebooting. I also did the cmd S fsck -fy before that and all was well.
The other day I had the flashing folder again...I got it going a couple of times but it happened again. Right now I seem to be in deep trouble. Please read the following:
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3. Did command s and fsck but at the end I get the message failed to issue comm reset after 3 attempts.....failing....
4. I powered down, vacuumed out the vents, sprayed compressed air to make sure it wasn't over heating from dust buildup as I read somewhere.
5. Booted up...worked for about 5 minutes again.
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Sorry to bear bad news, but most likely the drive is already dead or dying. I hope you backed up everything when the first symptoms appeared.
There are data recovery services, but might be very expensive.
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Message was edited by: WZZZ

Blue screen with flashing folder and question mark on startup

Hello.
I need help with my Macbook Pro. I get a blue screen with a flashing folder and a question mark at start up. To date I have tried the following:
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Flashing folder with question mark comes up at startup?

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> there is no Mac OS partition, I assume it would be directly underneath the HD on the left?
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$5 Toolkit: http://eshop.macsales.com/item/OWC/TOOLKITMHD/
$22 USB 3.0 enclosure: http://eshop.macsales.com/item/OWC/ES2.5BU3W/
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