Stubborn iPhone 2G won't turn on, refuses firmware restoring

[Macindows]

The iPhoen 2G won't turn on, no matter how long I press Sleep/Wake/Home. When I connect it to USB in recovery mode, the following happens:
iPhone 2G - Youtube

When I connect it in DFU mode, the very same happens just with error 1604 instead of 1611.

So far I tried:
- Windows & Mac machines
- Different USB ports & removing hubs
- Official and hacked iOS 3.1.3 & 3.1.2
- DFU mode & recovery mode
- (Windows) With iReb, the iPhone actually went into the "Custom Firmware ready" screen, as seen below, but gave error 1604 while restoring.

Any suggestions?

 

[PsstGreek]

Snowbreeze, that's your problem. Put your iPhone back into DFU then restore with 3.1.2. Then jailbreak and unlock with Redsn0w.

You don't need a custom firmware on a 2G.

 

[Macindows]

Snowbreeze, that's your problem. Put your iPhone back into DFU then restore with 3.1.2. Then jailbreak and unlock with Redsn0w.

I'm pretty sure that I tried 3.1.2 already but I will download it now just to be sure. What do you mean with Snowbreeze? Why is that my problem?

 

[Macindows]

No, didn't work. I still get error 1611 while restoring.