Yep there is.
Ok what you need to do is this.
Get 2 peices of wire. solder them BOTH to ground.
Solder one to point A18.
Solder the other to point A19.
Then plug everything back in and boot (Remember you need to be able to cut BOTH wires later, so please make sure you have enough slack in them to be able to see them to cut!!)
The XBox will now boot.
Use you favourite method to start the flashing process with a 1 MB Bios file.
After the bios is detected and you get the press (Button) or Y or whatever (Depending on the flashing method) Cut BOTH wires. Then press the appropriate button to start the flashing process.
Now test the reflash. It should work.
Then remove the wires from the board.
1 Xbox saved from the brink of doom