Thanks for asking me to be your tech buddy.
May I pls inform you that my knowledge and experience with mobile phones and PDAs would be at best described as "for personal consumption only".
In any case, it would seem that the company/website that deals with the X500 is www.etencorp.com
. Their support/download page is here
. There is however another company/website http://glofiish.com/
that also deals with your unit. heir support/download page is here
. Available on that page are manuals, software, Windows Mobile Upgrades (Versions 5 & 6). You need to joij as a member. Additionally, the updates require a licensed copy of WM5.
The good news is all are in English. There is also a ROM update which may be needed if the unit has firmware issues as others in your original post have posted.
Another that I would like to suggest (if you haven't tried yet) is to leave the battery off the unit at least overnight.
For the moment, try to download all related files, manuals, updates, firmware, ROM and whatever you feel would be relevant to your X500. Please create a temporary folder in your PC to house all the downloaded files.