If you have a Sharp TSOP, you NEED to solder that wire into place or else you wont be able to flash it. Don't connect it while it's on, you might screw something up.
Also, HeXEn takes a while to boot. That's normal.
When i power it on The DVD rom checks for a disc, the hard drive spools up, and the fan powers up to the original speed. The LED is green and at no point changes colors. It doesnt act like it loads the softmod though it just acts like an unmodded xbox. It has no audio or video output. When i push the Eject button on the front it shuts down, and boots up again. The LED flashes green when you push Eject like you were normally opening the drive tray. The tray does not come out though.
Not a good sign.... I had a console that did this (V1.0), I had to do this to get it back to life:
http://www.llamma.com/xbox/Repairs/ComaConsole.htm
(I ended up killing it by connecting wrong wires while bank switching. I tried to save it with a modchip but damage was already done. it was my fault, don't worry, it's not very difficult)
If that IS your problem, which is most likely the case looking at the syndromes it has, you'll have to connect a wire from A19 to the ground point on the capacitor (look at the picture on the page, it is under the motherboard). If the console still does the same, connect the wire to A18 (while still being attached to ground). If it STILL doesn't boot, your TSOP is probably f*cked. You'll have to get a chip.
(This is where i got my chips from BTW, very good place:
http://www.eurasia.nu/shop/product_info ... cts_id=266)
I hope you get it working !
Good luck
)