Continues kernel panic

Hello!

I really hope somebody will be able to help me out here.

I recently bought a used Macbook 2,1 (mid 2007)

Ever since i got it, it has been showing the kernel panic at every startup - even when try to boot from usb.

I've been searching a bit around for a solution but I've been unable to find a permanent fix.

The only thing that has seemed to work so far, is when i perform a smc reset and that only works with one boot. If I restart the Mac again the kernel panic is back.

What I have tried so far:

• Clearing the pram and nvram (which I was unable to do)
• Starting up in safe mode (which I was unable to do)
• Reinstalling the os (both lion and snow leopard - didn't work)
• Repairing disk permissions and the disk (didn't work)
• Starting in single-user mode (wasn't able to type anything)
• Unplugging some of the hardware (airport, superdrive, bluetooth, harddisk - didn't work.

Is there anybody out who can help me out?