Hello and welcome.
You've probably seen these threads (there are numerous threads on this subject just search h1xx forums for connected)but I'll post the links just in case
Fixed H320 Always connected prob
Temp fix for always connected/HDD Check error (With pics!)
The daughter board is only held on by 4 solder joints if you need to remove it.
There are also some good board scans at rockbox witch may be of some use
http://www.rockbox.org/twiki/bin/vie...fo#Board_scans .