Should'nt the orange light come on whenever AC power is connected even if the ROM is not working?
If the battery is fully charged, I believe, the light will go out.
If you truly have tried everything that's been recommended throughout these forums, your options are limited.
You can call Sharp and send your Zaurus in for repair.
You can help the rest of us (see "unbricking" thread in General Discussion) try to figure out how/where to get a JTAG cable, Zaurus pads/adapter and the appropriate bootloaders.
Or you can use your Zaurus as a coaster.
At the moment I've got a bricked 5000d that I am trying to bring back to life and am very close to just sending it in for repair (even though I would much rather learn how to fix it myself [so I can brick it over and over again ]).
I have yet to place a glass of liquid on top of it.