If the first mobo had a bad IDE controller, it might be. But there's only one way to find out.
1) Find a friend with a computer (preferably one with a CD Burner).
2) BEG him to let you put your hard drive into it, so that you can back up the data on it.
3) If your friend is knowledgeble, let him put the drive in for you, since it is his machine. If not, set your drive to slave, and put it on the same channel as his hard drive.
4) Run a scandisk on your drive. Not a throurogh one, just a standard one for now.
5) If you can see your stuff on the drive and scandisk runs properly, make not of that.
6) I suggest you back up your data
If you don't have a friend, or if you were able to see your data, do the following on a comp with a CD Burner (on a CDR, not an RW!).
1) Reattach your drive (if you unattached it. Make sure to set the drive back to master).
2) Go on the internet to
www.knoppix.org .
3) Switch to English, if you can't read German.
4) Follow the links to download the KNOPPIX ISO.
5) Use your burning software to 'burn an image'. This imageis the file you downoaded (you may have to set the file-type to ISO image).
6) Enjoy a coke (not coke) as you wait for your CD to burn.
7) Put the CD into the malfunctioning computer's CD Drive (or the master CD Drive, if more than one). Reboot the machine or turn it on if you magically put the CD in without opening the drive tray
8) Press enter at the loading screen.
*NOTE* 9) I forgot to mention, USB mice won't work. You need a PS/2 Mouse (or one of the other kinds of mice). A USB>PS/2 adapter should work
10) Try to load your hard drive. It should be something like hda1. You may have to mount it first. Right click on it an select mount.
11) Note if you can see your files or not.
12) Shut down by clicking the orange power button at the botton of the screen.