I recently did a battery pull on my Bold. When it rebooted I got JUM Error 517. I did a quick search on the forums on how to deal with it but the info was 2 years old and not applicable to the Bold (I think).
I tried to use the desktop manager to upload the OS again but it's not even recognizing my Bold to be able to do that.
Get crackmem v3.4 its free i just not have link for it on hand.
Open it up and on the left there should be the OS listed if you downloaded it and installed it on the PC... make sure it is checked off.
Ok .. then choose WIPE and see if it wipes the bugger out and if so it will load that OS as well when it gets wiped.... if it does not load the OS ... then use BB manager to load it.
Now if this above fails.... well then ATT here you come... unless anyone else here has any other options.