Default iPAQ RW6818 Bootloader Hanged! Please help

Hi all,

I got a 6818 and i tried to upgrade the Latest HP Official ROM from their web site. But no luck that the upgrade is fail. After that, my 6818 hanged on a white screen with a small [HP Invent] Logo , BL1.0.5 show on the bottom of the screen. I tried to run thru this forumn and didn't got any tips.

If their anyone can give me some instructions or steps on how to re-flash my 6818 to work again?

Thanks a lot! Thousand thanks.